PEP8 type comparison cleanup

Fixes bug #910295

The None, True, and False values are singletons.

All variable *comparisons* to singletons should use 'is' or 'is not'.
All variable *evaluations* to boolean should use 'if' or 'if not'.

"== None", "== True", "== False", and "!= None" comparisons in sqlalchemy's
where(), or_(), filter(), and_(), and select() functions should not be changed.

Incorrect comparisons or evaluations in comments were not changed.

Change-Id: I087f0883bf115b5fe714ccfda86a794b9b2a87f7

1 files changed, 4 insertions, 4 deletions

diff --git a/bin/nova-manage b/bin/nova-manage
index 7ac365950..a61b5c1dd 100755
--- a/bin/nova-manage
+++ b/bin/nova-manage
@@ -1605,7 +1605,7 @@ class VsaDriveTypeCommands(object):
         if name is not None:
             search_opts['extra_specs']['name'] = name
 
-        if all == False:
+        if not all:
             search_opts['extra_specs']['visible'] = '1'
 
         drives = volume_types.get_all_types(self.context,
@@ -1973,7 +1973,7 @@ class StorageManagerCommands(object):
         ctxt = context.get_admin_context()
 
         try:
-            if flavor == None:
+            if flavor is None:
                 flavors = db.sm_flavor_get_all(ctxt)
             else:
                 flavors = db.sm_flavor_get(ctxt, flavor)
@@ -2015,7 +2015,7 @@ class StorageManagerCommands(object):
         ctxt = context.get_admin_context()
 
         try:
-            if backend_conf_id == None:
+            if backend_conf_id is None:
                 backends = db.sm_backend_conf_get_all(ctxt)
             else:
                 backends = db.sm_backend_conf_get(ctxt, backend_conf_id)
@@ -2075,7 +2075,7 @@ class StorageManagerCommands(object):
         print '(WARNING: Creating will destroy all data on backend!!!)'
         c = raw_input('Proceed? (y/n) ')
         if c == 'y' or c == 'Y':
-            if flavor_label == None:
+            if flavor_label is None:
                 print "error: backend needs to be associated with flavor"
                 sys.exit(2)