Fix flake8 gating in tox.

- based on https://review.openstack.org/#/c/26327/.
- fix the remaining violations.

swsync/filler.py

@@ -206,7 +206,7 @@ def create_objects(cnx, acc, o_amount, fmax, index_containers):
                              "(filename: %s,\tsize: %.3f KB)" %
                              (container,
                              object_name.encode('ascii', 'ignore'),
-                             float(len(data))/1024))
+                             float(len(data)) / 1024))
                 obj_info = {'object_info':
                             (object_name, etag, len(data)), 'meta': meta}
                 containers_d[container]['objects'].append(obj_info)

swsync/objects.py

@@ -60,7 +60,7 @@ def get_object(storage_url, token,
 
     if not swift.common.http.is_success(resp.status):
         resp.read()
-        #TODO: logging
+        # TODO(chmou): logging
         raise swiftclient.ClientException(
             'status %s %s' % (resp.status, resp.reason))
 

tests/functional/test_middleware_lm.py

@@ -20,8 +20,8 @@
 #   Last-Modified middleware must be installed in the proxy-server
 #   pipeline.
 
-import unittest
 import swiftclient
+import unittest
 
 CONF = {
     'user': ('demo:demo', 'wxcvbn'),

tox.ini

@@ -15,7 +15,7 @@ deps = -r{toxinidir}/tools/pip-requires
 commands = python setup.py testr --testr-args="{posargs}"
 
 [testenv:flake8]
-deps = flake8
+sitepackages = False
 commands = flake8 --show-source swsync bin setup.py tests
 
 [testenv:venv]
@@ -26,3 +26,8 @@ commands = python setup.py testr --coverage
 
 [tox:jenkins]
 downloadcache = ~/cache/pip
+
+[flake8]
+ignore = E12,E711,E721,E712,H302,H303,H403,H404,F
+builtins = _
+exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,plugins,tools