Formatting and docstring tweaks re #377

1 files changed, 14 insertions, 3 deletions

diff --git a/paramiko/channel.py b/paramiko/channel.py
index ae1a06fd..38772283 100644
--- a/paramiko/channel.py
+++ b/paramiko/channel.py
@@ -43,16 +43,27 @@ from paramiko import pipe
 # lower bound on the max packet size we'll accept from the remote host
 MIN_PACKET_SIZE = 1024
 
+
 def requires_open_channel(func):
-    """This decorator makes sure that the channel is open, else it raises an
-    SSHException."""
+    """
+    Decorator for `.Channel` methods which performs an openness check.
+
+    :raises SSHException:
+        If the wrapped method is called on an unopened `.Channel`.
+    """
     @wraps(func)
     def _check(self, *args, **kwds):
-        if self.closed or self.eof_received or self.eof_sent or not self.active:
+        if (
+            self.closed
+            or self.eof_received
+            or self.eof_sent
+            or not self.active
+        ):
             raise SSHException('Channel is not open')
         return func(self, *args, **kwds)
     return _check
 
+
 class Channel (object):
     """
     A secure tunnel across an SSH `.Transport`.  A Channel is meant to behave