scenario_test: pep8 and pylint improvements

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>

22 files changed, 586 insertions, 400 deletions

diff --git a/test/scenario_test/bgp_router_test.py b/test/scenario_test/bgp_router_test.py
index 09f5501b..24f86e77 100644
--- a/test/scenario_test/bgp_router_test.py
+++ b/test/scenario_test/bgp_router_test.py
@@ -13,23 +13,33 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import
+
 import json
-import unittest
-from fabric.api import local
-from lib import base
-from lib.base import wait_for_completion
-from lib.gobgp import *
-from lib.quagga import *
-from lib.exabgp import *
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import chain
-import ryu.lib.pcaplib as pcap
-from ryu.lib.packet.packet import Packet
-from ryu.lib.packet.bgp import BGPMessage, BGPUpdate
+
+from lib import base
+from lib.base import (
+    BGP_FSM_IDLE,
+    BGP_FSM_ACTIVE,
+    BGP_FSM_ESTABLISHED,
+    BGP_ATTR_TYPE_MULTI_EXIT_DISC,
+    BGP_ATTR_TYPE_LOCAL_PREF,
+    wait_for_completion,
+)
+from lib.gobgp import (
+    GoBGPContainer,
+    extract_path_attribute,
+)
+from lib.quagga import QuaggaBGPContainer
+from lib.exabgp import ExaBGPContainer
 
 
 class GoBGPTestBase(unittest.TestCase):
@@ -51,7 +61,7 @@ class GoBGPTestBase(unittest.TestCase):
 
         # advertise a route from q1, q2, q3
         for idx, q in enumerate(qs):
-            route = '10.0.{0}.0/24'.format(idx+1)
+            route = '10.0.{0}.0/24'.format(idx + 1)
             q.add_route(route)
 
         initial_wait_time = max(ctn.run() for ctn in ctns)
@@ -109,7 +119,7 @@ class GoBGPTestBase(unittest.TestCase):
     # check routes are properly advertised to all BGP speaker
     def test_04_check_quagga_global_rib(self):
         interval = 1
-        timeout = int(120/interval)
+        timeout = int(120 / interval)
         for q in self.quaggas.itervalues():
             done = False
             for _ in range(timeout):
@@ -130,7 +140,7 @@ class GoBGPTestBase(unittest.TestCase):
             if done:
                 continue
             # should not reach here
-            self.assertTrue(False)
+            raise AssertionError
 
     def test_05_add_quagga(self):
         q4 = QuaggaBGPContainer(name='q4', asn=65004, router_id='192.168.0.5')
diff --git a/test/scenario_test/bgp_zebra_test.py b/test/scenario_test/bgp_zebra_test.py
index 24b1477f..8857f801 100644
--- a/test/scenario_test/bgp_zebra_test.py
+++ b/test/scenario_test/bgp_zebra_test.py
@@ -13,17 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import chain
+
+from lib import base
+from lib.base import (
+    Bridge,
+    BGP_FSM_ESTABLISHED,
+)
+from lib.gobgp import GoBGPContainer
+from lib.quagga import QuaggaBGPContainer
+
 
 class GoBGPTestBase(unittest.TestCase):
 
@@ -65,17 +73,20 @@ class GoBGPTestBase(unittest.TestCase):
         cls.gobgps = {'ipv4': g1_v4, 'ipv6': g1_v6}
         cls.quaggas = {'ipv4': q1_v4, 'ipv6': q1_v6}
         cls.others = {'ipv4': [o1_v4, o2_v4], 'ipv6': [o1_v6, o2_v6]}
-        cls.bridges = {'br01_v4' : br01_v4,
-                'br02_v4' : br02_v4,
-                'br03_v4' : br03_v4,
-                'br01_v6' : br01_v6,
-                'br02_v6' : br02_v6,
-                'br03_v6' : br03_v6}
+        cls.bridges = {
+            'br01_v4': br01_v4,
+            'br02_v4': br02_v4,
+            'br03_v4': br03_v4,
+            'br01_v6': br01_v6,
+            'br02_v6': br02_v6,
+            'br03_v6': br03_v6,
+        }
 
     """
       No.1 start up ipv4 containers and check state
            each neighbor is established in ipv4 environment
     """
+
     def test_01_check_neighbor_established(self):
         g1 = self.gobgps['ipv4']
         q1 = self.quaggas['ipv4']
@@ -99,6 +110,7 @@ class GoBGPTestBase(unittest.TestCase):
       No.2 check whether the ping is reachable in container
            that have previously beyond the gobpg in ipv4 environment
     """
+
     def test_02_check_reachablily_beyond_gobgp_from_quagga(self):
         g1 = self.gobgps['ipv4']
         q1 = self.quaggas['ipv4']
@@ -108,9 +120,9 @@ class GoBGPTestBase(unittest.TestCase):
         for info in g1.ip_addrs:
             if 'br01_v4' in info[2]:
                 next_hop = info[1].split('/')[0]
-        self.assertFalse(next_hop == None)
+        self.assertFalse(next_hop is None)
         o1.add_static_route(self.bridges['br02_v4'].subnet, next_hop)
-        addr = [e[1] for e in o1.ip_addrs if 'br01_v4' in e[2] ]
+        addr = [e[1] for e in o1.ip_addrs if 'br01_v4' in e[2]]
         self.assertTrue(len(addr) == 1)
         q1.get_reachablily(addr[0])
 
@@ -118,6 +130,7 @@ class GoBGPTestBase(unittest.TestCase):
       No.3 check whether the ping is reachable in container
            that have previously beyond the quagga in ipv4 environment
     """
+
     def test_03_check_reachablily_beyond_quagga_from_gobgp(self):
         g1 = self.gobgps['ipv4']
         q1 = self.quaggas['ipv4']
@@ -125,7 +138,7 @@ class GoBGPTestBase(unittest.TestCase):
 
         next_hop = q1.ip_addrs[2][1].split('/')[0]
         o2.add_static_route(self.bridges['br02_v4'].subnet, next_hop)
-        addr = [e[1] for e in o2.ip_addrs if 'br03_v4' in e[2] ]
+        addr = [e[1] for e in o2.ip_addrs if 'br03_v4' in e[2]]
         self.assertTrue(len(addr) == 1)
         g1.get_reachablily(addr[0])
 
@@ -133,6 +146,7 @@ class GoBGPTestBase(unittest.TestCase):
       No.4 start up ipv4 containers and check state
            each neighbor is established in ipv6 environment
     """
+
     def test_04_check_neighbor_established_v6(self):
         g1 = self.gobgps['ipv6']
         q1 = self.quaggas['ipv6']
@@ -156,6 +170,7 @@ class GoBGPTestBase(unittest.TestCase):
       No.5 check whether the ping is reachable in container
            that have previously beyond the gobpg in ipv6 environment
     """
+
     def test_05_check_reachablily_beyond_gobgp_from_quagga(self):
         g1 = self.gobgps['ipv6']
         q1 = self.quaggas['ipv6']
@@ -164,7 +179,7 @@ class GoBGPTestBase(unittest.TestCase):
         next_hop = g1.ip_addrs[1][1].split('/')[0]
         g1.set_ipv6_forward()
         o1.add_static_route(self.bridges['br02_v6'].subnet, next_hop)
-        addr = [e[1] for e in o1.ip_addrs if 'br01_v6' in e[2] ]
+        addr = [e[1] for e in o1.ip_addrs if 'br01_v6' in e[2]]
         self.assertTrue(len(addr) == 1)
         q1.get_reachablily(addr[0])
 
@@ -172,6 +187,7 @@ class GoBGPTestBase(unittest.TestCase):
       No.6 check whether the ping is reachable in container
            that have previously beyond the quagga in ipv6 environment
     """
+
     def test_06_check_reachablily_beyond_quagga_from_gobgp(self):
         g1 = self.gobgps['ipv6']
         q1 = self.quaggas['ipv6']
@@ -180,7 +196,7 @@ class GoBGPTestBase(unittest.TestCase):
         next_hop = q1.ip_addrs[2][1].split('/')[0]
         q1.set_ipv6_forward()
         o2.add_static_route(self.bridges['br02_v6'].subnet, next_hop)
-        addr = [e[1] for e in o2.ip_addrs if 'br03_v6' in e[2] ]
+        addr = [e[1] for e in o2.ip_addrs if 'br03_v6' in e[2]]
         self.assertTrue(len(addr) == 1)
         g1.get_reachablily(addr[0])
 
diff --git a/test/scenario_test/ci-scripts/build_embeded_go.py b/test/scenario_test/ci-scripts/build_embeded_go.py
index 1fc70bca..e0f17e56 100644
--- a/test/scenario_test/ci-scripts/build_embeded_go.py
+++ b/test/scenario_test/ci-scripts/build_embeded_go.py
@@ -2,6 +2,7 @@ import sys
 import os
 from subprocess import call
 
+
 def cut(filename, out):
     with open(filename, 'r') as f:
         flag = False
@@ -16,6 +17,7 @@ def cut(filename, out):
             elif flag:
                 codes.append(line)
 
+
 if __name__ == '__main__':
     filename = sys.argv[1]
     out = '/tmp/test.go'
diff --git a/test/scenario_test/evpn_test.py b/test/scenario_test/evpn_test.py
index ac83fe2d..5e2637c8 100644
--- a/test/scenario_test/evpn_test.py
+++ b/test/scenario_test/evpn_test.py
@@ -13,22 +13,30 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
+from itertools import combinations
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import combinations
+
+from lib import base
+from lib.base import (
+    BGP_FSM_ESTABLISHED,
+    BGP_ATTR_TYPE_EXTENDED_COMMUNITIES,
+)
+from lib.gobgp import GoBGPContainer
+
 
 def get_mac_mobility_sequence(pattr):
-    for ecs in [p['value'] for p in pattr
-                if 'type' in p and \
-                p['type'] == BGP_ATTR_TYPE_EXTENDED_COMMUNITIES]:
+    for ecs in [
+            p['value'] for p in pattr
+            if 'type' in p and p['type'] == BGP_ATTR_TYPE_EXTENDED_COMMUNITIES]:
         for ec in [e for e in ecs if 'type' in e and e['type'] == 6]:
             if ec['subtype'] == 0:
                 if 'sequence' not in ec:
@@ -82,7 +90,7 @@ class GoBGPTestBase(unittest.TestCase):
         self.assertTrue(path['nexthop'] == '0.0.0.0')
 
         interval = 1
-        timeout = int(30/interval)
+        timeout = int(30 / interval)
         done = False
         for _ in range(timeout):
             if done:
diff --git a/test/scenario_test/flow_spec_test.py b/test/scenario_test/flow_spec_test.py
index 950ed0bf..89918f6b 100644
--- a/test/scenario_test/flow_spec_test.py
+++ b/test/scenario_test/flow_spec_test.py
@@ -13,17 +13,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.exabgp import *
+from __future__ import absolute_import
+
+from itertools import combinations
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import combinations
+
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
+from lib.exabgp import ExaBGPContainer
 
 
 class GoBGPTestBase(unittest.TestCase):
diff --git a/test/scenario_test/global_policy_test.py b/test/scenario_test/global_policy_test.py
index 1e1b85b0..13eaabb4 100644
--- a/test/scenario_test/global_policy_test.py
+++ b/test/scenario_test/global_policy_test.py
@@ -13,17 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.exabgp import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import chain
+
+from lib import base
+from lib.base import (
+    BGP_FSM_IDLE,
+    BGP_FSM_ESTABLISHED,
+    BGP_ATTR_TYPE_COMMUNITIES,
+)
+from lib.gobgp import GoBGPContainer
+from lib.exabgp import ExaBGPContainer
 
 
 def community_exists(path, com):
@@ -55,7 +63,7 @@ class GoBGPTestBase(unittest.TestCase):
 
         # advertise a route from q1, q2, q3
         for idx, q in enumerate(qs):
-            route = '10.0.{0}.0/24'.format(idx+1)
+            route = '10.0.{0}.0/24'.format(idx + 1)
             q.add_route(route)
 
         initial_wait_time = max(ctn.run() for ctn in ctns)
@@ -184,7 +192,7 @@ class GoBGPTestBase(unittest.TestCase):
     def test_13_check_adj_rib_out(self):
         q1 = self.quaggas['q1']
         for path in self.gobgp.get_adj_rib_out(q1):
-            self.assertTrue(path['local-pref'] == None)
+            self.assertTrue(path['local-pref'] is None)
         q5 = self.quaggas['q5']
         for path in self.gobgp.get_adj_rib_out(q5):
             self.assertTrue(path['local-pref'] == 300)
diff --git a/test/scenario_test/graceful_restart_test.py b/test/scenario_test/graceful_restart_test.py
index 5c8bba65..926bcbd0 100644
--- a/test/scenario_test/graceful_restart_test.py
+++ b/test/scenario_test/graceful_restart_test.py
@@ -13,17 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import (
+    BGP_FSM_ACTIVE,
+    BGP_FSM_ESTABLISHED,
+)
+from lib.gobgp import GoBGPContainer
+
+
 class GoBGPTestBase(unittest.TestCase):
 
     @classmethod
@@ -86,7 +94,7 @@ class GoBGPTestBase(unittest.TestCase):
 
     def test_04_add_non_graceful_restart_enabled_peer(self):
         g1 = self.bgpds['g1']
-        g2 = self.bgpds['g2']
+        # g2 = self.bgpds['g2']
         gobgp_ctn_image_name = parser_option.gobgp_image
         g3 = GoBGPContainer(name='g3', asn=65002, router_id='192.168.0.3',
                             ctn_image_name=gobgp_ctn_image_name,
diff --git a/test/scenario_test/ibgp_router_test.py b/test/scenario_test/ibgp_router_test.py
index 5eaca936..0a497278 100644
--- a/test/scenario_test/ibgp_router_test.py
+++ b/test/scenario_test/ibgp_router_test.py
@@ -13,18 +13,26 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.base import wait_for_completion
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
+from itertools import combinations
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import combinations
+
+from lib import base
+from lib.base import (
+    BGP_FSM_IDLE,
+    BGP_FSM_ESTABLISHED,
+)
+from lib.base import wait_for_completion
+from lib.gobgp import GoBGPContainer
+from lib.quagga import QuaggaBGPContainer
 
 
 class GoBGPTestBase(unittest.TestCase):
@@ -45,7 +53,7 @@ class GoBGPTestBase(unittest.TestCase):
 
         # advertise a route from q1, q2
         for idx, c in enumerate(qs):
-            route = '10.0.{0}.0/24'.format(idx+1)
+            route = '10.0.{0}.0/24'.format(idx + 1)
             c.add_route(route)
 
         initial_wait_time = max(ctn.run() for ctn in ctns)
@@ -119,7 +127,7 @@ class GoBGPTestBase(unittest.TestCase):
     # check routes are properly advertised to all BGP speaker
     def test_06_check_quagga_global_rib(self):
         interval = 1
-        timeout = int(120/interval)
+        timeout = int(120 / interval)
         for q in self.quaggas.itervalues():
             done = False
             for _ in range(timeout):
@@ -134,7 +142,7 @@ class GoBGPTestBase(unittest.TestCase):
 
                 peer_info = self.gobgp.peers[q]
                 local_addr = peer_info['local_addr'].split('/')[0]
-                for r in self.gobgp.routes.keys():
+                for r in self.gobgp.routes:
                     self.assertTrue(r in (p['prefix'] for p in global_rib))
                     for rr in global_rib:
                         if rr['prefix'] == r:
@@ -150,7 +158,7 @@ class GoBGPTestBase(unittest.TestCase):
             if done:
                 continue
             # should not reach here
-            self.assertTrue(False)
+            raise AssertionError
 
     def test_07_add_ebgp_peer(self):
         q3 = QuaggaBGPContainer(name='q3', asn=65001, router_id='192.168.0.4')
@@ -174,7 +182,7 @@ class GoBGPTestBase(unittest.TestCase):
         q3 = self.quaggas['q3']
         paths = self.gobgp.get_adj_rib_out(q3)
         total_len = len(q1.routes) + len(q2.routes) + len(self.gobgp.routes)
-        assert(len(paths) == total_len)
+        assert len(paths) == total_len
         for path in paths:
             peer_info = self.gobgp.peers[q3]
             local_addr = peer_info['local_addr'].split('/')[0]
@@ -252,9 +260,9 @@ class GoBGPTestBase(unittest.TestCase):
         q1 = self.quaggas['q1']
         q2 = self.quaggas['q2']
         for q in [q1, q2]:
-            def f():
+            def _f():
                 return prefix in [p['nlri']['prefix'] for p in self.gobgp.get_adj_rib_out(q)]
-            wait_for_completion(f)
+            wait_for_completion(_f)
 
         def f():
             return len(q2.get_global_rib(prefix)) == 1
@@ -267,20 +275,20 @@ class GoBGPTestBase(unittest.TestCase):
         prefix = '10.0.4.0/24'
         q1.add_route(prefix)
 
-        def f():
+        def f1():
             l = self.gobgp.get_global_rib(prefix)
             return len(l) == 1 and len(l[0]['paths']) == 2
-        wait_for_completion(f)
+        wait_for_completion(f1)
 
-        def f():
+        def f2():
             return prefix not in [p['nlri']['prefix'] for p in self.gobgp.get_adj_rib_out(q2)]
-        wait_for_completion(f)
+        wait_for_completion(f2)
 
-        def f():
+        def f3():
             l = q2.get_global_rib(prefix)
             # route from ibgp so aspath should be empty
             return len(l) == 1 and len(l[0]['aspath']) == 0
-        wait_for_completion(f)
+        wait_for_completion(f3)
 
 
 if __name__ == '__main__':
diff --git a/test/scenario_test/long_lived_graceful_restart_test.py b/test/scenario_test/long_lived_graceful_restart_test.py
index 53145a03..1f07af08 100644
--- a/test/scenario_test/long_lived_graceful_restart_test.py
+++ b/test/scenario_test/long_lived_graceful_restart_test.py
@@ -13,17 +13,24 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
+from itertools import chain
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import chain
+
+from lib import base
+from lib.base import (
+    BGP_FSM_ACTIVE,
+    BGP_FSM_ESTABLISHED,
+)
+from lib.gobgp import GoBGPContainer
 
 
 class GoBGPTestBase(unittest.TestCase):
@@ -97,7 +104,7 @@ class GoBGPTestBase(unittest.TestCase):
         self.assertTrue(len(g3.get_global_rib('10.0.0.0/24')) == 1)
         # check llgr-stale community is added to 10.0.0.0/24
         r = g3.get_global_rib('10.0.0.0/24')[0]['paths'][0]
-        comms = list(chain.from_iterable([ attr['communities'] for attr in r['attrs'] if attr['type'] == 8]))
+        comms = list(chain.from_iterable([attr['communities'] for attr in r['attrs'] if attr['type'] == 8]))
         self.assertTrue(0xffff0006 in comms)
         # g4 is not llgr capable, llgr-stale route must be
         # withdrawn
@@ -111,8 +118,8 @@ class GoBGPTestBase(unittest.TestCase):
     def test_03_neighbor_established(self):
         g1 = self.bgpds['g1']
         g2 = self.bgpds['g2']
-        g3 = self.bgpds['g3']
-        g4 = self.bgpds['g4']
+        # g3 = self.bgpds['g3']
+        # g4 = self.bgpds['g4']
         g1.wait_for(expected_state=BGP_FSM_ESTABLISHED, peer=g2)
         time.sleep(1)
         self.assertTrue(len(g1.get_global_rib('10.0.0.0/24')) == 1)
@@ -137,7 +144,7 @@ class GoBGPTestBase(unittest.TestCase):
         g1.wait_for(expected_state=BGP_FSM_ACTIVE, peer=g2)
 
         time.sleep(1)
-        
+
         # llgr_stale route depreference must happend
         # check g4's path is chosen as best and advertised
         rib = g3.get_global_rib('10.0.0.0/24')
@@ -149,7 +156,6 @@ class GoBGPTestBase(unittest.TestCase):
         self.assertTrue(len(rib) == 1)
         self.assertTrue(g2.asn in rib[0]['paths'][0]['aspath'])
 
-
     def test_05_llgr_restart_timer_expire(self):
         time.sleep(35)
         g3 = self.bgpds['g3']
diff --git a/test/scenario_test/route_reflector_test.py b/test/scenario_test/route_reflector_test.py
index 462bde33..28845841 100644
--- a/test/scenario_test/route_reflector_test.py
+++ b/test/scenario_test/route_reflector_test.py
@@ -13,17 +13,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import combinations
+
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
+from lib.quagga import QuaggaBGPContainer
+
 
 def wait_for(f, timeout=120):
     interval = 1
@@ -58,7 +63,7 @@ class GoBGPTestBase(unittest.TestCase):
 
         # advertise a route from q1, q2
         for idx, c in enumerate(qs):
-            route = '10.0.{0}.0/24'.format(idx+1)
+            route = '10.0.{0}.0/24'.format(idx + 1)
             c.add_route(route)
 
         initial_wait_time = max(ctn.run() for ctn in ctns)
@@ -98,7 +103,7 @@ class GoBGPTestBase(unittest.TestCase):
 
                 return len(routes) == 0
             wait_for(f)
- 
+
     def test_03_check_gobgp_adj_rib_out(self):
         for q in self.quaggas.itervalues():
             paths = [p['nlri']['prefix'] for p in self.gobgp.get_adj_rib_out(q)]
@@ -115,6 +120,7 @@ class GoBGPTestBase(unittest.TestCase):
                         else:
                             self.assertFalse(p in paths)
 
+
 if __name__ == '__main__':
     output = local("which docker 2>&1 > /dev/null ; echo $?", capture=True)
     if int(output) is not 0:
diff --git a/test/scenario_test/route_server_as2_test.py b/test/scenario_test/route_server_as2_test.py
index b391aa46..2c79a5fe 100644
--- a/test/scenario_test/route_server_as2_test.py
+++ b/test/scenario_test/route_server_as2_test.py
@@ -13,17 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import absolute_import
+
 import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.exabgp import *
 import sys
-import os
 import time
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import (
+    BGP_FSM_IDLE,
+    BGP_FSM_ESTABLISHED,
+)
+from lib.gobgp import GoBGPContainer
+from lib.exabgp import ExaBGPContainer
+
 
 class GoBGPTestBase(unittest.TestCase):
 
@@ -39,18 +47,15 @@ class GoBGPTestBase(unittest.TestCase):
                             ctn_image_name=gobgp_ctn_image_name,
                             log_level=parser_option.gobgp_log_level)
 
-        rs_clients = [ExaBGPContainer(name='q{0}'.format(i+1), asn=65001+i,
-                      router_id='192.168.0.{0}'.format(i+2))
-                      for i in range(4)]
+        rs_clients = [
+            ExaBGPContainer(name='q{0}'.format(i + 1), asn=(65001 + i),
+                            router_id='192.168.0.{0}'.format(i + 2))
+            for i in range(4)]
         ctns = [g1] + rs_clients
-        q1 = rs_clients[0]
-        q2 = rs_clients[1]
-        q3 = rs_clients[2]
-        q4 = rs_clients[3]
 
         # advertise a route from route-server-clients
         for idx, rs_client in enumerate(rs_clients):
-            route = '10.0.{0}.0/24'.format(idx+1)
+            route = '10.0.{0}.0/24'.format(idx + 1)
             rs_client.add_route(route)
             if idx < 2:
                 route = '10.0.10.0/24'
@@ -68,8 +73,7 @@ class GoBGPTestBase(unittest.TestCase):
             rs_client.add_peer(g1, as2=as2)
 
         cls.gobgp = g1
-        cls.quaggas = { x.name: x for x in rs_clients }
-
+        cls.quaggas = {x.name: x for x in rs_clients}
 
     # test each neighbor state is turned establish
     def test_01_neighbor_established(self):
@@ -87,7 +91,7 @@ class GoBGPTestBase(unittest.TestCase):
                 self.assertEqual(state, BGP_FSM_ESTABLISHED)
                 local_rib = self.gobgp.get_local_rib(rs_client)
                 local_rib = [p['prefix'] for p in local_rib]
-                if len(local_rib) < len(self.quaggas)-1:
+                if len(local_rib) < (len(self.quaggas) - 1):
                     time.sleep(self.wait_per_retry)
                     continue
 
@@ -97,7 +101,7 @@ class GoBGPTestBase(unittest.TestCase):
             if done:
                 continue
             # should not reach here
-            self.assertTrue(False)
+            raise AssertionError
 
     def test_03_stop_q2_and_check_neighbor_status(self):
         q2 = self.quaggas['q2']
diff --git a/test/scenario_test/route_server_ipv4_v6_test.py b/test/scenario_test/route_server_ipv4_v6_test.py
index 9b228875..8fdd05b8 100644
--- a/test/scenario_test/route_server_ipv4_v6_test.py
+++ b/test/scenario_test/route_server_ipv4_v6_test.py
@@ -13,17 +13,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
+from lib.quagga import QuaggaBGPContainer
+
 
 class GoBGPIPv6Test(unittest.TestCase):
 
@@ -48,11 +53,11 @@ class GoBGPIPv6Test(unittest.TestCase):
         v6 = [q3, q4]
 
         for idx, q in enumerate(v4):
-            route = '10.0.{0}.0/24'.format(idx+1)
+            route = '10.0.{0}.0/24'.format(idx + 1)
             q.add_route(route)
 
         for idx, q in enumerate(v6):
-            route = '2001:{0}::/96'.format(idx+1)
+            route = '2001:{0}::/96'.format(idx + 1)
             q.add_route(route, rf='ipv6')
 
         initial_wait_time = max(ctn.run() for ctn in ctns)
@@ -83,11 +88,11 @@ class GoBGPIPv6Test(unittest.TestCase):
                 self.assertEqual(state, BGP_FSM_ESTABLISHED)
                 local_rib = self.gobgp.get_local_rib(rs_client, rf=rf)
                 local_rib = [p['prefix'] for p in local_rib]
-                if len(local_rib) < len(ctns)-1:
+                if len(local_rib) < (len(ctns) - 1):
                     time.sleep(self.wait_per_retry)
                     continue
 
-                self.assertTrue(len(local_rib) == (len(ctns)-1))
+                self.assertTrue(len(local_rib) == (len(ctns) - 1))
 
                 for c in ctns.itervalues():
                     if rs_client != c:
@@ -98,7 +103,7 @@ class GoBGPIPv6Test(unittest.TestCase):
             if done:
                 continue
             # should not reach here
-            self.assertTrue(False)
+            raise AssertionError
 
     def check_rs_client_rib(self, ctns, rf):
         for rs_client in ctns.itervalues():
@@ -122,7 +127,7 @@ class GoBGPIPv6Test(unittest.TestCase):
             if done:
                 continue
             # should not reach here
-            self.assertTrue(False)
+            raise AssertionError
 
     # test each neighbor state is turned establish
     def test_01_neighbor_established(self):
@@ -155,12 +160,12 @@ class GoBGPIPv6Test(unittest.TestCase):
 
     def test_08_check_rib(self):
         for q in self.ipv4s.itervalues():
-            self.assertTrue(all( p['filtered'] for p in self.gobgp.get_adj_rib_in(q)))
+            self.assertTrue(all(p['filtered'] for p in self.gobgp.get_adj_rib_in(q)))
             self.assertTrue(len(self.gobgp.get_adj_rib_out(q)) == 0)
             self.assertTrue(len(q.get_global_rib()) == len(q.routes))
 
         for q in self.ipv6s.itervalues():
-            self.assertTrue(all( p['filtered'] for p in self.gobgp.get_adj_rib_in(q, rf='ipv6')))
+            self.assertTrue(all(p['filtered'] for p in self.gobgp.get_adj_rib_in(q, rf='ipv6')))
             self.assertTrue(len(self.gobgp.get_adj_rib_out(q, rf='ipv6')) == 0)
             self.assertTrue(len(q.get_global_rib(rf='ipv6')) == len(q.routes))
 
diff --git a/test/scenario_test/route_server_malformed_test.py b/test/scenario_test/route_server_malformed_test.py
index 653d42f1..d56b5e2e 100644
--- a/test/scenario_test/route_server_malformed_test.py
+++ b/test/scenario_test/route_server_malformed_test.py
@@ -13,20 +13,23 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
-from lib.exabgp import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
-import nose
+import unittest
 import inspect
-from nose.tools import *
+
+from fabric.api import local
+import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
+from lib.exabgp import ExaBGPContainer
+
 
 counter = 1
 _SCENARIOS = {}
@@ -102,11 +105,13 @@ class MalformedMpReachNlri(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Attribute Flags Error / 0x600E0411223344' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -144,11 +149,13 @@ class MalformedMpUnReachNlri(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Attribute Flags Error / 0x600F0411223344' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -193,11 +200,13 @@ class MalformedAsPath(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Attribute Flags Error / 0x60020411223344' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -235,11 +244,13 @@ class MalformedAs4Path(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Attribute Flags Error / 0x60110411223344' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -284,11 +295,13 @@ class MalformedNexthop(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Attribute Flags Error / 0x600E08010110FFFFFF0000' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -333,11 +346,13 @@ class MalformedRouteFamily(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Attribute Flags Error / 0x600E150002011020010DB800000000000000000000000100' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -382,11 +397,13 @@ class MalformedAsPathSegmentLengthInvalid(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Malformed AS_PATH / 0x4002040202FFDC' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -426,11 +443,13 @@ class MalformedNexthopLoopbackAddr(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Invalid NEXT_HOP Attribute / 0x4003047F000001' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -473,11 +492,13 @@ class MalformedOriginType(object):
         g1 = env.g1
         e1 = env.e1
         e2 = env.e2
+
         def f():
             for line in e1.log().split('\n'):
                 if 'UPDATE message error / Invalid ORIGIN Attribute / 0x40010104' in line:
                     return True
             return False
+
         wait_for(f)
         # check e2 is still established
         g1.wait_for(BGP_FSM_ESTABLISHED, e2)
@@ -489,7 +510,7 @@ class MalformedOriginType(object):
         lookup_scenario("MalformedOriginType").check(env)
 
 
-class TestGoBGPBase():
+class TestGoBGPBase(unittest.TestCase):
 
     wait_per_retry = 5
     retry_limit = 10
@@ -520,7 +541,7 @@ class TestGoBGPBase():
         for e in self.executors:
             yield e
 
-            
+
 if __name__ == '__main__':
     output = local("which docker 2>&1 > /dev/null ; echo $?", capture=True)
     if int(output) is not 0:
diff --git a/test/scenario_test/route_server_policy_grpc_test.py b/test/scenario_test/route_server_policy_grpc_test.py
index e858558a..582b533e 100644
--- a/test/scenario_test/route_server_policy_grpc_test.py
+++ b/test/scenario_test/route_server_policy_grpc_test.py
@@ -13,20 +13,33 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
-from lib.exabgp import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
-import nose
+import unittest
 import inspect
-from nose.tools import *
+
+from fabric.api import local
+import nose
+from nose.tools import (
+    assert_true,
+    assert_false,
+)
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import (
+    Bridge,
+    BGP_FSM_ESTABLISHED,
+    BGP_ATTR_TYPE_COMMUNITIES,
+    BGP_ATTR_TYPE_EXTENDED_COMMUNITIES,
+)
+from lib.gobgp import GoBGPContainer
+from lib.quagga import QuaggaBGPContainer
+from lib.exabgp import ExaBGPContainer
+
 
 counter = 1
 _SCENARIOS = {}
@@ -247,7 +260,7 @@ class ImportPolicyUpdate(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -261,8 +274,8 @@ class ImportPolicyUpdate(object):
     def setup2(env):
         g1 = env.g1
         e1 = env.e1
-        q1 = env.q1
-        q2 = env.q2
+        # q1 = env.q1
+        # q2 = env.q2
 
         g1.local('gobgp policy prefix del ps0 192.168.200.0/24')
         g1.softreset(e1)
@@ -270,7 +283,7 @@ class ImportPolicyUpdate(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -347,7 +360,7 @@ class ExportPolicyUpdate(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -374,7 +387,7 @@ class ExportPolicyUpdate(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -392,6 +405,7 @@ class ExportPolicyUpdate(object):
         lookup_scenario("ExportPolicyUpdate").setup2(env)
         lookup_scenario("ExportPolicyUpdate").check2(env)
 
+
 @register_scenario
 class ExportPolicyUpdateRouteRefresh(object):
     """
@@ -457,6 +471,7 @@ class ExportPolicyUpdateRouteRefresh(object):
         lookup_scenario("ExportPolicyUpdateRouteRefresh").setup2(env)
         lookup_scenario("ExportPolicyUpdateRouteRefresh").check2(env)
 
+
 @register_scenario
 class ImportPolicyIPV6(object):
     """
@@ -661,8 +676,8 @@ class ImportPolicyIPV6Update(object):
     def setup2(env):
         g1 = env.g1
         e1 = env.e1
-        q1 = env.q1
-        q2 = env.q2
+        # q1 = env.q1
+        # q2 = env.q2
 
         g1.local('gobgp policy prefix del ps0 2001:0:10:20::/64')
         g1.softreset(e1, rf='ipv6')
@@ -807,9 +822,9 @@ class ImportPolicyAsPathLengthCondition(object):
         g1.local('gobgp neighbor {0} policy import add policy0'.format(g1.peers[q2]['neigh_addr'].split('/')[0]))
 
         # this will be blocked
-        e1.add_route('192.168.100.0/24', aspath=range(e1.asn, e1.asn-10, -1))
+        e1.add_route('192.168.100.0/24', aspath=range(e1.asn, e1.asn - 10, -1))
         # this will pass
-        e1.add_route('192.168.200.0/24', aspath=range(e1.asn, e1.asn-8, -1))
+        e1.add_route('192.168.200.0/24', aspath=range(e1.asn, e1.asn - 8, -1))
 
         for c in [e1, q1, q2]:
             g1.wait_for(BGP_FSM_ESTABLISHED, c)
@@ -817,7 +832,7 @@ class ImportPolicyAsPathLengthCondition(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 2)
@@ -863,9 +878,9 @@ class ImportPolicyAsPathCondition(object):
         g1.local('gobgp neighbor {0} policy import add policy0'.format(g1.peers[q2]['neigh_addr'].split('/')[0]))
 
         # this will be blocked
-        e1.add_route('192.168.100.0/24', aspath=range(e1.asn, e1.asn-10, -1))
+        e1.add_route('192.168.100.0/24', aspath=range(e1.asn, e1.asn - 10, -1))
         # this will pass
-        e1.add_route('192.168.200.0/24', aspath=range(e1.asn-1, e1.asn-10, -1))
+        e1.add_route('192.168.200.0/24', aspath=range(e1.asn - 1, e1.asn - 10, -1))
 
         for c in [e1, q1, q2]:
             g1.wait_for(BGP_FSM_ESTABLISHED, c)
@@ -1066,7 +1081,7 @@ class ImportPolicyAsPathMismatchCondition(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 2)
@@ -1119,8 +1134,6 @@ class ImportPolicyCommunityCondition(object):
         for c in [e1, q1, q2]:
             g1.wait_for(BGP_FSM_ESTABLISHED, c)
 
-
-
     @staticmethod
     def check(env):
         lookup_scenario("ImportPolicy").check(env)
@@ -1224,7 +1237,7 @@ class ImportPolicyCommunityAction(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 1)
@@ -1269,7 +1282,6 @@ class ImportPolicyCommunityReplace(object):
     def boot(env):
         lookup_scenario("ImportPolicy").boot(env)
 
-
     @staticmethod
     def setup(env):
         g1 = env.g1
@@ -1290,7 +1302,6 @@ class ImportPolicyCommunityReplace(object):
         for c in [e1, q1, q2]:
             g1.wait_for(BGP_FSM_ESTABLISHED, c)
 
-
     @staticmethod
     def check(env):
         lookup_scenario('ImportPolicyCommunityAction').check(env)
@@ -1298,7 +1309,7 @@ class ImportPolicyCommunityReplace(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -1356,7 +1367,7 @@ class ImportPolicyCommunityRemove(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -1369,7 +1380,7 @@ class ImportPolicyCommunityRemove(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         adj_out = g1.get_adj_rib_out(q1)
@@ -2277,8 +2288,8 @@ class InPolicyUpdate(object):
     def setup2(env):
         g1 = env.g1
         e1 = env.e1
-        q1 = env.q1
-        q2 = env.q2
+        # q1 = env.q1
+        # q2 = env.q2
         g1.clear_policy()
 
         g1.local('gobgp policy prefix del ps0 192.168.200.0/24')
@@ -2373,7 +2384,7 @@ class ExportPolicyAsPathPrepend(object):
         assert_true(path['aspath'] == [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.20.0/24')[0]
-        assert_true(path['aspath'] == [65005]*5 + [e1.asn])
+        assert_true(path['aspath'] == ([65005] * 5) + [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.200.0/24')[0]
         assert_true(path['aspath'] == [e1.asn])
@@ -2439,10 +2450,10 @@ class ImportPolicyAsPathPrependLastAS(object):
         assert_true(path['aspath'] == [e1.asn])
 
         path = g1.get_local_rib(q2, prefix='192.168.20.0/24')[0]['paths'][0]
-        assert_true(path['aspath'] == [e1.asn]*5 + [e1.asn])
+        assert_true(path['aspath'] == ([e1.asn] * 5) + [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.20.0/24')[0]
-        assert_true(path['aspath'] == [e1.asn]*5 + [e1.asn])
+        assert_true(path['aspath'] == ([e1.asn] * 5) + [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.200.0/24')[0]
         assert_true(path['aspath'] == [e1.asn])
@@ -2511,7 +2522,7 @@ class ExportPolicyAsPathPrependLastAS(object):
         assert_true(path['aspath'] == [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.20.0/24')[0]
-        assert_true(path['aspath'] == [e1.asn]*5 + [e1.asn])
+        assert_true(path['aspath'] == ([e1.asn] * 5) + [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.200.0/24')[0]
         assert_true(path['aspath'] == [e1.asn])
@@ -2710,7 +2721,7 @@ class ImportPolicyExCommunityAdd(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -2725,6 +2736,7 @@ class ImportPolicyExCommunityAdd(object):
         lookup_scenario("ImportPolicyExCommunityAdd").check(env)
         lookup_scenario("ImportPolicyExCommunityAdd").check2(env)
 
+
 @register_scenario
 class ImportPolicyExCommunityAdd2(object):
     """
@@ -2766,7 +2778,7 @@ class ImportPolicyExCommunityAdd2(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -2828,7 +2840,7 @@ class ImportPolicyExCommunityMultipleAdd(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -2890,7 +2902,7 @@ class ExportPolicyExCommunityAdd(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -2908,7 +2920,7 @@ class ExportPolicyExCommunityAdd(object):
         lookup_scenario("ExportPolicyExCommunityAdd").check2(env)
 
 
-class TestGoBGPBase():
+class TestGoBGPBase(unittest.TestCase):
 
     wait_per_retry = 5
     retry_limit = 10
diff --git a/test/scenario_test/route_server_policy_test.py b/test/scenario_test/route_server_policy_test.py
index 34cfde0e..d1968fcd 100644
--- a/test/scenario_test/route_server_policy_test.py
+++ b/test/scenario_test/route_server_policy_test.py
@@ -13,20 +13,33 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
-from lib.exabgp import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
-import nose
+import unittest
 import inspect
-from nose.tools import *
+
+from fabric.api import local
+import nose
+from nose.tools import (
+    assert_true,
+    assert_false,
+)
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import (
+    Bridge,
+    BGP_FSM_ESTABLISHED,
+    BGP_ATTR_TYPE_COMMUNITIES,
+    BGP_ATTR_TYPE_EXTENDED_COMMUNITIES,
+)
+from lib.gobgp import GoBGPContainer
+from lib.quagga import QuaggaBGPContainer
+from lib.exabgp import ExaBGPContainer
+
 
 counter = 1
 _SCENARIOS = {}
@@ -112,8 +125,8 @@ class ImportPolicy(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -178,8 +191,8 @@ class ExportPolicy(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -264,8 +277,8 @@ class ImportPolicyUpdate(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -282,7 +295,7 @@ class ImportPolicyUpdate(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -296,7 +309,7 @@ class ImportPolicyUpdate(object):
     def setup2(env):
         g1 = env.g1
         e1 = env.e1
-        q1 = env.q1
+        # q1 = env.q1
         q2 = env.q2
         g1.clear_policy()
 
@@ -311,8 +324,9 @@ class ImportPolicyUpdate(object):
         g1.set_neighbor_set(ns0)
 
         st0 = {'name': 'st0',
-               'conditions': {'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                              'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+               'conditions': {
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -323,7 +337,7 @@ class ImportPolicyUpdate(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -391,8 +405,9 @@ class ExportPolicyUpdate(object):
         g1.set_neighbor_set(ns0)
 
         st0 = {'name': 'st0',
-               'conditions': {'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                              'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+               'conditions': {
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -409,7 +424,7 @@ class ExportPolicyUpdate(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -438,8 +453,9 @@ class ExportPolicyUpdate(object):
         g1.set_neighbor_set(ns0)
 
         st0 = {'name': 'st0',
-               'conditions': {'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                              'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+               'conditions': {
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -455,7 +471,7 @@ class ExportPolicyUpdate(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -534,8 +550,8 @@ class ImportPolicyIPV6(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -603,8 +619,8 @@ class ExportPolicyIPV6(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -685,8 +701,8 @@ class ImportPolicyIPV6Update(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -713,7 +729,7 @@ class ImportPolicyIPV6Update(object):
     def setup2(env):
         g1 = env.g1
         e1 = env.e1
-        q1 = env.q1
+        # q1 = env.q1
         q2 = env.q2
 
         p0 = {'ip-prefix': '2001:0:10:2::/64'}
@@ -728,8 +744,8 @@ class ImportPolicyIPV6Update(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {
                    'route-disposition': 'reject-route'}}
 
@@ -806,8 +822,8 @@ class ExportPolicyIPv6Update(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -849,8 +865,8 @@ class ExportPolicyIPv6Update(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -909,9 +925,9 @@ class ImportPolicyAsPathLengthCondition(object):
         g1.add_policy(policy, q2, 'import')
 
         # this will be blocked
-        e1.add_route('192.168.100.0/24', aspath=range(e1.asn, e1.asn-10, -1))
+        e1.add_route('192.168.100.0/24', aspath=range(e1.asn, e1.asn - 10, -1))
         # this will pass
-        e1.add_route('192.168.200.0/24', aspath=range(e1.asn, e1.asn-8, -1))
+        e1.add_route('192.168.200.0/24', aspath=range(e1.asn, e1.asn - 8, -1))
 
         for c in [e1, q1, q2]:
             g1.wait_for(BGP_FSM_ESTABLISHED, c)
@@ -919,7 +935,7 @@ class ImportPolicyAsPathLengthCondition(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 2)
@@ -969,9 +985,9 @@ class ImportPolicyAsPathCondition(object):
         g1.add_policy(policy, q2, 'import')
 
         # this will be blocked
-        e1.add_route('192.168.100.0/24', aspath=range(e1.asn, e1.asn-10, -1))
+        e1.add_route('192.168.100.0/24', aspath=range(e1.asn, e1.asn - 10, -1))
         # this will pass
-        e1.add_route('192.168.200.0/24', aspath=range(e1.asn-1, e1.asn-10, -1))
+        e1.add_route('192.168.200.0/24', aspath=range(e1.asn - 1, e1.asn - 10, -1))
 
         for c in [e1, q1, q2]:
             g1.wait_for(BGP_FSM_ESTABLISHED, c)
@@ -1189,7 +1205,7 @@ class ImportPolicyAsPathMismatchCondition(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 2)
@@ -1246,8 +1262,6 @@ class ImportPolicyCommunityCondition(object):
         for c in [e1, q1, q2]:
             g1.wait_for(BGP_FSM_ESTABLISHED, c)
 
-
-
     @staticmethod
     def check(env):
         lookup_scenario("ImportPolicy").check(env)
@@ -1345,10 +1359,12 @@ class ImportPolicyCommunityAction(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-                'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0', 'match-set-options': 'any'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0', 'match-set-options': 'any'}}},
                'actions': {'route-disposition': 'accept-route',
-                           'bgp-actions': {'set-community': {'options': 'add',
-                                                           'set-community-method': {'communities-list': ['65100:20']}}}}}
+                           'bgp-actions': {
+                               'set-community': {
+                                   'options': 'add',
+                                   'set-community-method': {'communities-list': ['65100:20']}}}}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -1362,7 +1378,7 @@ class ImportPolicyCommunityAction(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 1)
@@ -1407,7 +1423,6 @@ class ImportPolicyCommunityReplace(object):
     def boot(env):
         lookup_scenario("ImportPolicy").boot(env)
 
-
     @staticmethod
     def setup(env):
         g1 = env.g1
@@ -1419,10 +1434,12 @@ class ImportPolicyCommunityReplace(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
                'actions': {'route-disposition': 'accept-route',
-                           'bgp-actions': {'set-community': {'options': 'REPLACE',
-                                                           'set-community-method': {'communities-list': ['65100:20']}}}}}
+                           'bgp-actions': {
+                               'set-community': {
+                                   'options': 'REPLACE',
+                                   'set-community-method': {'communities-list': ['65100:20']}}}}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -1433,7 +1450,6 @@ class ImportPolicyCommunityReplace(object):
         for c in [e1, q1, q2]:
             g1.wait_for(BGP_FSM_ESTABLISHED, c)
 
-
     @staticmethod
     def check(env):
         lookup_scenario('ImportPolicyCommunityAction').check(env)
@@ -1441,7 +1457,7 @@ class ImportPolicyCommunityReplace(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -1485,10 +1501,12 @@ class ImportPolicyCommunityRemove(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
                'actions': {'route-disposition': 'accept-route',
-                           'bgp-actions': {'set-community': {'options': 'REMOVE',
-                                                           'set-community-method': {'communities-list': ['65100:10', '65100:20']}}}}}
+                           'bgp-actions': {
+                               'set-community': {
+                                   'options': 'REMOVE',
+                                   'set-community-method': {'communities-list': ['65100:10', '65100:20']}}}}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -1504,7 +1522,7 @@ class ImportPolicyCommunityRemove(object):
     @staticmethod
     def check(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         wait_for(lambda: len(g1.get_local_rib(q1)) == 3)
@@ -1517,7 +1535,7 @@ class ImportPolicyCommunityRemove(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         adj_out = g1.get_adj_rib_out(q1)
@@ -1569,10 +1587,12 @@ class ImportPolicyCommunityNull(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
                'actions': {'route-disposition': 'accept-route',
-                           'bgp-actions': {'set-community': {'options': 'REPLACE',
-                                                             'set-community-method': {'communities-list': []}}}}}
+                           'bgp-actions': {
+                               'set-community': {
+                                   'options': 'REPLACE',
+                                   'set-community-method': {'communities-list': []}}}}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -1643,10 +1663,12 @@ class ExportPolicyCommunityAdd(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
                'actions': {'route-disposition': 'accept-route',
-                           'bgp-actions': {'set-community': {'options': 'add',
-                                                           'set-community-method': {'communities-list': ['65100:20']}}}}}
+                           'bgp-actions': {
+                               'set-community': {
+                                   'options': 'add',
+                                   'set-community-method': {'communities-list': ['65100:20']}}}}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -1716,10 +1738,12 @@ class ExportPolicyCommunityReplace(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
                'actions': {'route-disposition': 'accept-route',
-                           'bgp-actions': {'set-community': {'options': 'REPLACE',
-                                                           'set-community-method': {'communities-list': ['65100:20']}}}}}
+                           'bgp-actions': {
+                               'set-community': {
+                                   'options': 'REPLACE',
+                                   'set-community-method': {'communities-list': ['65100:20']}}}}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -1789,10 +1813,12 @@ class ExportPolicyCommunityRemove(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
                'actions': {'route-disposition': 'accept-route',
-                           'bgp-actions': {'set-community': {'options': 'REMOVE',
-                                                           'set-community-method': {'communities-list': ['65100:20', '65100:30']}}}}}
+                           'bgp-actions': {
+                               'set-community': {
+                                   'options': 'REMOVE',
+                                   'set-community-method': {'communities-list': ['65100:20', '65100:30']}}}}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -1860,15 +1886,17 @@ class ExportPolicyCommunityNull(object):
         e1 = env.e1
         q1 = env.q1
         q2 = env.q2
-        cs0 = {'community-sets':  [{'community-set-name': 'cs0', 'community-list': ['65100:10']}]}
+        cs0 = {'community-sets': [{'community-set-name': 'cs0', 'community-list': ['65100:10']}]}
 
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
                'actions': {'route-disposition': 'accept-route',
-                           'bgp-actions': {'set-community': {'options': 'REPLACE',
-                                                           'set-community-method': {'communities-list': []}}}}}
+                           'bgp-actions': {
+                               'set-community': {
+                                   'options': 'REPLACE',
+                                   'set-community-method': {'communities-list': []}}}}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -2313,7 +2341,7 @@ class InPolicyReject(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -2372,8 +2400,8 @@ class InPolicyAccept(object):
         g1.set_bgp_defined_set(cs0)
 
         st0 = {'name': 'st0',
-               'conditions':{'bgp-conditions':{'match-community-set':{'community-set': 'cs0'}}},
-               'actions':{'route-disposition': 'accept-route'}}
+               'conditions': {'bgp-conditions': {'match-community-set': {'community-set': 'cs0'}}},
+               'actions': {'route-disposition': 'accept-route'}}
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -2446,8 +2474,8 @@ class InPolicyUpdate(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -2479,8 +2507,8 @@ class InPolicyUpdate(object):
     def setup2(env):
         g1 = env.g1
         e1 = env.e1
-        q1 = env.q1
-        q2 = env.q2
+        # q1 = env.q1
+        # q2 = env.q2
         g1.clear_policy()
 
         p0 = {'ip-prefix': '192.168.20.0/24'}
@@ -2494,8 +2522,9 @@ class InPolicyUpdate(object):
         g1.set_neighbor_set(ns0)
 
         st0 = {'name': 'st0',
-               'conditions': {'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                          'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+               'conditions': {
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -2600,7 +2629,7 @@ class ExportPolicyAsPathPrepend(object):
         assert_true(path['aspath'] == [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.20.0/24')[0]
-        assert_true(path['aspath'] == [65005]*5 + [e1.asn])
+        assert_true(path['aspath'] == ([65005] * 5) + [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.200.0/24')[0]
         assert_true(path['aspath'] == [e1.asn])
@@ -2674,10 +2703,10 @@ class ImportPolicyAsPathPrependLastAS(object):
         assert_true(path['aspath'] == [e1.asn])
 
         path = g1.get_local_rib(q2, prefix='192.168.20.0/24')[0]['paths'][0]
-        assert_true(path['aspath'] == [e1.asn]*5 + [e1.asn])
+        assert_true(path['aspath'] == ([e1.asn] * 5) + [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.20.0/24')[0]
-        assert_true(path['aspath'] == [e1.asn]*5 + [e1.asn])
+        assert_true(path['aspath'] == ([e1.asn] * 5) + [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.200.0/24')[0]
         assert_true(path['aspath'] == [e1.asn])
@@ -2754,7 +2783,7 @@ class ExportPolicyAsPathPrependLastAS(object):
         assert_true(path['aspath'] == [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.20.0/24')[0]
-        assert_true(path['aspath'] == [e1.asn]*5 + [e1.asn])
+        assert_true(path['aspath'] == ([e1.asn] * 5) + [e1.asn])
 
         path = g1.get_adj_rib_out(q2, prefix='192.168.200.0/24')[0]
         assert_true(path['aspath'] == [e1.asn])
@@ -2794,7 +2823,7 @@ class ImportPolicyExCommunityOriginCondition(object):
         g1.set_bgp_defined_set(es0)
 
         st0 = {'name': 'st0',
-               'conditions': {'bgp-conditions':{'match-ext-community-set':{'ext-community-set': 'es0'}}},
+               'conditions': {'bgp-conditions': {'match-ext-community-set': {'ext-community-set': 'es0'}}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -2845,7 +2874,7 @@ class ImportPolicyExCommunityTargetCondition(object):
         g1.set_bgp_defined_set(es0)
 
         st0 = {'name': 'st0',
-               'conditions': {'bgp-conditions':{'match-ext-community-set':{'ext-community-set': 'es0'}}},
+               'conditions': {'bgp-conditions': {'match-ext-community-set': {'ext-community-set': 'es0'}}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -2897,8 +2926,7 @@ class InPolicyPrefixCondition(object):
         g1.set_prefix_set(ps0)
 
         st0 = {'name': 'st0',
-               'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']}},
+               'conditions': {'match-prefix-set': {'prefix-set': ps0['prefix-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -2968,8 +2996,8 @@ class ImportPolicyExCommunityAdd(object):
             'conditions': {
                 'match-prefix-set': {
                     'prefix-set': ps0['prefix-set-name']
-                    }
-                },
+                }
+            },
             'actions': {
                 'route-disposition': 'accept-route',
                 'bgp-actions': {
@@ -2977,11 +3005,11 @@ class ImportPolicyExCommunityAdd(object):
                         'options': 'add',
                         'set-ext-community-method': {
                             'communities-list': ['rt:65000:1'],
-                            }
-                        },
-                    }
+                        }
+                    },
                 }
             }
+        }
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -2999,7 +3027,7 @@ class ImportPolicyExCommunityAdd(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -3048,8 +3076,8 @@ class ImportPolicyExCommunityAdd2(object):
             'conditions': {
                 'match-prefix-set': {
                     'prefix-set': ps0['prefix-set-name']
-                    }
-                },
+                }
+            },
             'actions': {
                 'route-disposition': 'accept-route',
                 'bgp-actions': {
@@ -3057,11 +3085,11 @@ class ImportPolicyExCommunityAdd2(object):
                         'options': 'add',
                         'set-ext-community-method': {
                             'communities-list': ['rt:65100:100'],
-                            }
-                        },
-                    }
+                        }
+                    },
                 }
             }
+        }
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -3079,7 +3107,7 @@ class ImportPolicyExCommunityAdd2(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -3133,8 +3161,8 @@ class ImportPolicyExCommunityMultipleAdd(object):
             'conditions': {
                 'match-prefix-set': {
                     'prefix-set': ps0['prefix-set-name']
-                    }
-                },
+                }
+            },
             'actions': {
                 'route-disposition': 'accept-route',
                 'bgp-actions': {
@@ -3142,11 +3170,11 @@ class ImportPolicyExCommunityMultipleAdd(object):
                         'options': 'add',
                         'set-ext-community-method': {
                             'communities-list': ['rt:65100:100', 'rt:100:100'],
-                            }
-                        },
-                    }
+                        }
+                    },
                 }
             }
+        }
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -3164,7 +3192,7 @@ class ImportPolicyExCommunityMultipleAdd(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -3218,8 +3246,8 @@ class ExportPolicyExCommunityAdd(object):
             'conditions': {
                 'match-prefix-set': {
                     'prefix-set': ps0['prefix-set-name']
-                    }
-                },
+                }
+            },
             'actions': {
                 'route-disposition': 'accept-route',
                 'bgp-actions': {
@@ -3227,11 +3255,11 @@ class ExportPolicyExCommunityAdd(object):
                         'options': 'add',
                         'set-ext-community-method': {
                             'communities-list': ['rt:65000:1'],
-                            }
-                        },
-                    }
+                        }
+                    },
                 }
             }
+        }
 
         policy = {'name': 'policy0',
                   'statements': [st0]}
@@ -3249,7 +3277,7 @@ class ExportPolicyExCommunityAdd(object):
     @staticmethod
     def check2(env):
         g1 = env.g1
-        e1 = env.e1
+        # e1 = env.e1
         q1 = env.q1
         q2 = env.q2
         path = g1.get_adj_rib_out(q1)[0]
@@ -3316,8 +3344,8 @@ class InPolicyUpdate2(object):
 
         st0 = {'name': 'st0',
                'conditions': {
-                'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -3349,8 +3377,8 @@ class InPolicyUpdate2(object):
     def setup2(env):
         g1 = env.g1
         e1 = env.e1
-        q1 = env.q1
-        q2 = env.q2
+        # q1 = env.q1
+        # q2 = env.q2
         g1.clear_policy()
 
         p0 = {'ip-prefix': '192.168.20.0/24'}
@@ -3365,8 +3393,9 @@ class InPolicyUpdate2(object):
         g1.set_neighbor_set(ns0)
 
         st0 = {'name': 'st0',
-               'conditions': {'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
-                          'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
+               'conditions': {
+                   'match-prefix-set': {'prefix-set': ps0['prefix-set-name']},
+                   'match-neighbor-set': {'neighbor-set': ns0['neighbor-set-name']}},
                'actions': {'route-disposition': 'reject-route'}}
 
         policy = {'name': 'policy0',
@@ -3470,7 +3499,7 @@ class InPolicyRejectImplicitWithdraw(object):
     def setup(env):
         g1 = env.g1
         g2 = env.g2
-        g3 = env.g3
+        # g3 = env.g3
         g4 = env.g4
 
         as0 = {'as-path-sets': [{'as-path-set-name': 'as0', 'as-path-list': ['_65002$']}]}
@@ -3492,11 +3521,10 @@ class InPolicyRejectImplicitWithdraw(object):
 
         g2.wait_for(BGP_FSM_ESTABLISHED, g1)
 
-
     @staticmethod
     def check(env):
         g1 = env.g1
-        g2 = env.g2
+        # g2 = env.g2
         g4 = env.g4
         wait_for(lambda: len(g1.get_local_rib(g4)) == 1)
         wait_for(lambda: len(g1.get_local_rib(g4)[0]['paths']) == 1)
@@ -3537,7 +3565,6 @@ class InPolicyRejectImplicitWithdraw(object):
         wait_for(lambda: len(g1.get_local_rib(g4)) == 0)
         wait_for(lambda: len(g4.get_global_rib()) == 0)
 
-
     @staticmethod
     def executor(env):
         lookup_scenario("InPolicyRejectImplicitWithdraw").boot(env)
@@ -3549,7 +3576,7 @@ class InPolicyRejectImplicitWithdraw(object):
         lookup_scenario("InPolicyRejectImplicitWithdraw").check3(env)
 
 
-class TestGoBGPBase():
+class TestGoBGPBase(unittest.TestCase):
 
     wait_per_retry = 5
     retry_limit = 10
diff --git a/test/scenario_test/route_server_softreset_test.py b/test/scenario_test/route_server_softreset_test.py
index 181274c7..172d3827 100644
--- a/test/scenario_test/route_server_softreset_test.py
+++ b/test/scenario_test/route_server_softreset_test.py
@@ -13,17 +13,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.exabgp import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
+
 
 class GoBGPTestBase(unittest.TestCase):
 
@@ -84,7 +88,7 @@ class GoBGPTestBase(unittest.TestCase):
 
         pol0 = {'name': 'pol0', 'statements': [st0]}
 
-        filename = g1.add_policy(pol0, g3, 'in', 'reject')
+        _filename = g1.add_policy(pol0, g3, 'in', 'reject')
 
         g3.add_route('10.0.10.0/24')
         g3.add_route('10.0.20.0/24')
@@ -102,7 +106,7 @@ class GoBGPTestBase(unittest.TestCase):
         time.sleep(1)
 
         num2 = g2.get_neighbor(g1)['state']['messages']['received']['update']
-        self.assertTrue(num+1 == num2)
+        self.assertTrue((num + 1) == num2)
 
         g3.softreset(g1, type='out')
 
diff --git a/test/scenario_test/route_server_test.py b/test/scenario_test/route_server_test.py
index 5949f615..e83812a1 100644
--- a/test/scenario_test/route_server_test.py
+++ b/test/scenario_test/route_server_test.py
@@ -13,17 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import (
+    BGP_FSM_ACTIVE,
+    BGP_FSM_ESTABLISHED,
+)
+from lib.gobgp import GoBGPContainer
+from lib.quagga import QuaggaBGPContainer
+
 
 class GoBGPTestBase(unittest.TestCase):
 
@@ -39,9 +47,10 @@ class GoBGPTestBase(unittest.TestCase):
                             ctn_image_name=gobgp_ctn_image_name,
                             log_level=parser_option.gobgp_log_level)
 
-        rs_clients = [QuaggaBGPContainer(name='q{0}'.format(i+1), asn=65001+i,
-                      router_id='192.168.0.{0}'.format(i+2))
-                      for i in range(3)]
+        rs_clients = [
+            QuaggaBGPContainer(name='q{0}'.format(i + 1), asn=(65001 + i),
+                               router_id='192.168.0.{0}'.format(i + 2))
+            for i in range(3)]
         ctns = [g1] + rs_clients
         q1 = rs_clients[0]
         q2 = rs_clients[1]
@@ -50,7 +59,7 @@ class GoBGPTestBase(unittest.TestCase):
         # advertise a route from route-server-clients
         routes = []
         for idx, rs_client in enumerate(rs_clients):
-            route = '10.0.{0}.0/24'.format(idx+1)
+            route = '10.0.{0}.0/24'.format(idx + 1)
             rs_client.add_route(route)
             routes.append(route)
 
@@ -76,11 +85,11 @@ class GoBGPTestBase(unittest.TestCase):
 
                 state = self.gobgp.get_neighbor_state(rs_client)
                 self.assertEqual(state, BGP_FSM_ESTABLISHED)
-                if len(local_rib) < len(self.quaggas)-1:
+                if len(local_rib) < (len(self.quaggas) - 1):
                     time.sleep(self.wait_per_retry)
                     continue
 
-                self.assertTrue(len(local_rib) == (len(self.quaggas)-1))
+                self.assertTrue(len(local_rib) == (len(self.quaggas) - 1))
 
                 for c in self.quaggas.itervalues():
                     if rs_client != c:
@@ -91,7 +100,7 @@ class GoBGPTestBase(unittest.TestCase):
             if done:
                 continue
             # should not reach here
-            self.assertTrue(False)
+            raise AssertionError
 
     def check_rs_client_rib(self):
         for rs_client in self.quaggas.itervalues():
@@ -115,7 +124,7 @@ class GoBGPTestBase(unittest.TestCase):
             if done:
                 continue
             # should not reach here
-            self.assertTrue(False)
+            raise AssertionError
 
     # test each neighbor state is turned establish
     def test_01_neighbor_established(self):
@@ -208,9 +217,9 @@ class GoBGPTestBase(unittest.TestCase):
         self.gobgp.wait_for(expected_state=BGP_FSM_ESTABLISHED, peer=q3)
 
         def check_nexthop(target_prefix, expected_nexthop):
-            done = False
+            is_done = False
             for _ in range(self.retry_limit):
-                if done:
+                if is_done:
                     break
                 time.sleep(self.wait_per_retry)
                 for path in q1.get_global_rib():
@@ -220,9 +229,9 @@ class GoBGPTestBase(unittest.TestCase):
                         n_addrs = [i[1].split('/')[0] for i in
                                    expected_nexthop.ip_addrs]
                         if path['nexthop'] in n_addrs:
-                            done = True
+                            is_done = True
                             break
-            return done
+            return is_done
 
         done = check_nexthop('10.0.6.0/24', q3)
         self.assertTrue(done)
diff --git a/test/scenario_test/route_server_test2.py b/test/scenario_test/route_server_test2.py
index f1b3ba63..ef61a6b9 100644
--- a/test/scenario_test/route_server_test2.py
+++ b/test/scenario_test/route_server_test2.py
@@ -13,17 +13,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.exabgp import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
+from lib.exabgp import ExaBGPContainer
+
 
 class GoBGPTestBase(unittest.TestCase):
 
@@ -87,8 +92,8 @@ class GoBGPTestBase(unittest.TestCase):
         time.sleep(1)
         info = self.gobgp.get_neighbor(self.clients['g2'])['state']['adj-table']
         self.assertTrue(info['advertised'] == 1)
-        self.assertTrue('accepted' not in info) # means info['accepted'] == 0
-        self.assertTrue('received' not in info) # means info['received'] == 0
+        self.assertTrue('accepted' not in info)  # means info['accepted'] == 0
+        self.assertTrue('received' not in info)  # means info['received'] == 0
 
 
 if __name__ == '__main__':
diff --git a/test/scenario_test/rtc_test.py b/test/scenario_test/rtc_test.py
index 3e1a2520..84b8b333 100644
--- a/test/scenario_test/rtc_test.py
+++ b/test/scenario_test/rtc_test.py
@@ -13,17 +13,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
+from itertools import combinations
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import combinations
+
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
 
 
 class GoBGPTestBase(unittest.TestCase):
@@ -124,7 +128,8 @@ class GoBGPTestBase(unittest.TestCase):
         g5.local("gobgp vrf add vrf1 rd 100:100 rt both 100:100")
 
         time.sleep(1)
-        def check(client):
+
+        def check_rtc(client):
             rib = g3.get_adj_rib_out(client, rf='rtc')
             self.assertTrue(len(rib) == 1)
             path = rib[0]
@@ -132,13 +137,15 @@ class GoBGPTestBase(unittest.TestCase):
             ids = [attr['value'] for attr in path['attrs'] if attr['type'] == base.BGP_ATTR_TYPE_ORIGINATOR_ID]
             self.assertTrue(len(ids) == 1)
             self.assertTrue(ids[0] == g3.router_id)
-        check(g4)
-        check(g5)
+
+        check_rtc(g4)
+        check_rtc(g5)
 
         g4.local("gobgp vrf vrf1 rib add 40.0.0.0/24")
         g5.local("gobgp vrf vrf1 rib add 50.0.0.0/24")
         time.sleep(1)
-        def check(client):
+
+        def check_ipv4_l3vpn(client):
             rib = g3.get_adj_rib_out(client, rf='ipv4-l3vpn')
             self.assertTrue(len(rib) == 1)
             path = rib[0]
@@ -146,8 +153,9 @@ class GoBGPTestBase(unittest.TestCase):
             ids = [attr['value'] for attr in path['attrs'] if attr['type'] == base.BGP_ATTR_TYPE_ORIGINATOR_ID]
             self.assertTrue(len(ids) == 1)
             self.assertTrue(ids[0] != client.router_id)
-        check(g4)
-        check(g5)
+
+        check_ipv4_l3vpn(g4)
+        check_ipv4_l3vpn(g5)
 
     def test_08_rr_setup2(self):
         g1 = self.ctns['g1']
diff --git a/test/scenario_test/vrf_neighbor_test.py b/test/scenario_test/vrf_neighbor_test.py
index de2b0e41..78125169 100644
--- a/test/scenario_test/vrf_neighbor_test.py
+++ b/test/scenario_test/vrf_neighbor_test.py
@@ -13,17 +13,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
+
 
 class GoBGPTestBase(unittest.TestCase):
 
@@ -126,13 +130,13 @@ class GoBGPTestBase(unittest.TestCase):
         self.assertTrue(len(dst) == 1)
         self.assertTrue(len(dst[0]['paths']) == 1)
         path = dst[0]['paths'][0]
-        self.assertTrue([self.g1.asn] ==  path['aspath'])
+        self.assertTrue([self.g1.asn] == path['aspath'])
 
         dst = self.g6.get_global_rib('10.0.0.0/24')
         self.assertTrue(len(dst) == 1)
         self.assertTrue(len(dst[0]['paths']) == 1)
         path = dst[0]['paths'][0]
-        self.assertTrue([self.g5.asn, self.g4.asn, self.g1.asn] ==  path['aspath'])
+        self.assertTrue([self.g5.asn, self.g4.asn, self.g1.asn] == path['aspath'])
 
         dst = self.g7.get_global_rib('10.0.0.0/24')
         self.assertTrue(len(dst) == 0)
@@ -155,13 +159,13 @@ class GoBGPTestBase(unittest.TestCase):
         self.assertTrue(len(dst) == 1)
         self.assertTrue(len(dst[0]['paths']) == 1)
         path = dst[0]['paths'][0]
-        self.assertTrue([self.g5.asn, self.g4.asn, self.g1.asn] ==  path['aspath'])
+        self.assertTrue([self.g5.asn, self.g4.asn, self.g1.asn] == path['aspath'])
 
         dst = self.g7.get_global_rib('10.0.0.0/24')
         self.assertTrue(len(dst) == 1)
         self.assertTrue(len(dst[0]['paths']) == 1)
         path = dst[0]['paths'][0]
-        self.assertTrue([self.g5.asn, self.g4.asn, self.g3.asn] ==  path['aspath'])
+        self.assertTrue([self.g5.asn, self.g4.asn, self.g3.asn] == path['aspath'])
 
 
 if __name__ == '__main__':
diff --git a/test/scenario_test/vrf_neighbor_test2.py b/test/scenario_test/vrf_neighbor_test2.py
index 13596f26..cee3bf76 100644
--- a/test/scenario_test/vrf_neighbor_test2.py
+++ b/test/scenario_test/vrf_neighbor_test2.py
@@ -13,18 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.base import wait_for_completion
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
 
+from lib import base
+from lib.base import (
+    BGP_FSM_ACTIVE,
+    BGP_FSM_ESTABLISHED,
+    wait_for_completion,
+)
+from lib.gobgp import GoBGPContainer
+
 
 class GoBGPTestBase(unittest.TestCase):
 
diff --git a/test/scenario_test/zapi_v3_test.py b/test/scenario_test/zapi_v3_test.py
index a08550ec..f11d98e7 100644
--- a/test/scenario_test/zapi_v3_test.py
+++ b/test/scenario_test/zapi_v3_test.py
@@ -13,17 +13,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
-from fabric.api import local
-from lib import base
-from lib.gobgp import *
-from lib.quagga import *
+from __future__ import absolute_import
+
 import sys
-import os
 import time
+import unittest
+
+from fabric.api import local
 import nose
+
 from noseplugin import OptionParser, parser_option
-from itertools import chain
+
+from lib import base
+from lib.base import BGP_FSM_ESTABLISHED
+from lib.gobgp import GoBGPContainer
 
 
 class GoBGPTestBase(unittest.TestCase):
@@ -34,14 +37,14 @@ class GoBGPTestBase(unittest.TestCase):
         base.TEST_PREFIX = parser_option.test_prefix
 
         g1 = GoBGPContainer(name='g1', asn=65000, router_id='192.168.0.1',
-                               ctn_image_name=gobgp_ctn_image_name,
-                               log_level=parser_option.gobgp_log_level,
-                               zebra=True, zapi_version=3)
+                            ctn_image_name=gobgp_ctn_image_name,
+                            log_level=parser_option.gobgp_log_level,
+                            zebra=True, zapi_version=3)
 
         g2 = GoBGPContainer(name='g2', asn=65001, router_id='192.168.0.2',
-                               ctn_image_name=gobgp_ctn_image_name,
-                               log_level=parser_option.gobgp_log_level,
-                               zebra=True, zapi_version=3)
+                            ctn_image_name=gobgp_ctn_image_name,
+                            log_level=parser_option.gobgp_log_level,
+                            zebra=True, zapi_version=3)
 
         initial_wait_time = max(ctn.run() for ctn in [g1, g2])