1 files changed, 3 insertions, 3 deletions
diff --git a/libbe/storage/vcs/hg.py b/libbe/storage/vcs/hg.py
index 0ebdfb0..6198bc8 100644
--- a/libbe/storage/vcs/hg.py
+++ b/libbe/storage/vcs/hg.py
@@ -74,7 +74,7 @@ class Hg(base.VCS):
         self.__updated = [] # work around http://mercurial.selenic.com/bts/issue618
 
     def _vcs_version(self):
-        if version == None:
+        if version is None:
             return None
         return version()
 
@@ -106,7 +106,7 @@ class Hg(base.VCS):
 
     def _vcs_detect(self, path):
         """Detect whether a directory is revision-controlled using Mercurial"""
-        if self._u_search_parent_directories(path, '.hg') != None:
+        if self._u_search_parent_directories(path, '.hg') is not None:
             return True
         return False
 
@@ -131,7 +131,7 @@ class Hg(base.VCS):
         self.__updated.append(path) # work around http://mercurial.selenic.com/bts/issue618
 
     def _vcs_get_file_contents(self, path, revision=None):
-        if revision == None:
+        if revision is None:
             return base.VCS._vcs_get_file_contents(self, path, revision)
         else:
             return self._u_invoke_client('cat', '-r', revision, path)