geo-rep: code pep8/flake8 fixes

pep8 is a style guide for python.
http://legacy.python.org/dev/peps/pep-0008/

pep8 can be installed using, `pip install pep8`

Usage: `pep8 <python file>`, For example, `pep8 master.py`
will display all the coding standard errors.

flake8 is used to identify unused imports and other issues
in code.

pip install flake8

cd $GLUSTER_REPO/geo-replication/
flake8 syncdaemon

Updated license headers to each source file.

Change-Id: I01c7d0a6091d21bfa48720e9fb5624b77fa3db4a
Signed-off-by: Aravinda VK <avishwan@redhat.com>
Reviewed-on: http://review.gluster.org/7311
Reviewed-by: Kotresh HR <khiremat@redhat.com>
Reviewed-by: Prashanth Pai <ppai@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>

1 files changed, 17 insertions, 5 deletions

diff --git a/geo-replication/syncdaemon/libgfchangelog.py b/geo-replication/syncdaemon/libgfchangelog.py
index 68ec3baf144..ec563b36f29 100644
--- a/geo-replication/syncdaemon/libgfchangelog.py
+++ b/geo-replication/syncdaemon/libgfchangelog.py
@@ -1,7 +1,18 @@
+#
+# Copyright (c) 2011-2014 Red Hat, Inc. <http://www.redhat.com>
+# This file is part of GlusterFS.
+
+# This file is licensed to you under your choice of the GNU Lesser
+# General Public License, version 3 or any later version (LGPLv3 or
+# later), or the GNU General Public License, version 2 (GPLv2), in all
+# cases as published by the Free Software Foundation.
+#
+
 import os
-from ctypes import *
+from ctypes import CDLL, create_string_buffer, get_errno
 from ctypes.util import find_library
 
+
 class Changes(object):
     libgfc = CDLL(find_library("gfchangelog"), use_errno=True)
 
@@ -19,9 +30,10 @@ class Changes(object):
         return getattr(cls.libgfc, call)
 
     @classmethod
-    def cl_register(cls, brick, path, log_file, log_level, retries = 0):
+    def cl_register(cls, brick, path, log_file, log_level, retries=0):
         ret = cls._get_api('gf_changelog_register')(brick, path,
-                                                    log_file, log_level, retries)
+                                                    log_file,
+                                                    log_level, retries)
         if ret == -1:
             cls.raise_oserr()
 
@@ -49,8 +61,8 @@ class Changes(object):
         while True:
             ret = call(buf, 4096)
             if ret in (0, -1):
-                break;
-            changes.append(buf.raw[:ret-1])
+                break
+            changes.append(buf.raw[:ret - 1])
         if ret == -1:
             cls.raise_oserr()
         # cleanup tracker