Clean up warnings from newer flake8

Change-Id: I18a6327b3acdd4db5ae80097080c043f7c20c353

swiftclient/client.py

@@ -39,7 +39,7 @@ from swiftclient.utils import (
 # Default is 100, increase to 256
 http_client._MAXHEADERS = 256
 
-VERSIONFUL_AUTH_PATH = re.compile('v[2-3](?:\.0)?$')
+VERSIONFUL_AUTH_PATH = re.compile(r'v[2-3](?:\.0)?$')
 AUTH_VERSIONS_V1 = ('1.0', '1', 1)
 AUTH_VERSIONS_V2 = ('2.0', '2', 2)
 AUTH_VERSIONS_V3 = ('3.0', '3', 3)

swiftclient/service.py

@@ -173,6 +173,7 @@ def _build_default_global_options():
         'container_threads': 10
     }
 
+
 _default_global_options = _build_default_global_options()
 
 _default_local_options = {

swiftclient/shell.py

@@ -58,6 +58,7 @@ def immediate_exit(signum, frame):
     stderr.write(" Aborted\n")
     os_exit(2)
 
+
 st_delete_options = '''[--all] [--leave-segments]
                     [--object-threads <threads>]
                     [--container-threads <threads>]

tox.ini

@@ -79,7 +79,8 @@ commands=
 # H403: multi line docstrings should end on a new line
 # H404: multi line docstring should start without a leading new line
 # H405: multi line docstring summary not separated with an empty line
-ignore = H101,H301,H306,H401,H403,H404,H405
+# W504: line break after binary operator
+ignore = H101,H301,H306,H401,H403,H404,H405,W504
 # H106: Don’t put vim configuration in source files
 # H203: Use assertIs(Not)None to check for None
 enable-extensions=H106,H203