Compare None with object identity, not equality

Signed-off-by: Chris Lamb <lamby@debian.org>

diff --git a/daklib/srcformats.py b/daklib/srcformats.py
index 60da5bc0d7305e92a4e3b8c968caf2a247e0c99e..735b7b686c26b8f06bf5827c64ee215b1ef78d96 100644 (file)
--- a/daklib/srcformats.py
+++ b/daklib/srcformats.py
@@ -30,15 +30,18 @@ class SourceFormat(type):
     @classmethod
     def parse_format(cls, txt, is_a_dsc=False, field='files'):
         format = re_verwithext.search(txt)
-        if not format:
+
+        if format is None:
             raise UnknownFormatError, txt
 
         format = format.groups()
-        if format[1] == None:
+
+        if format[1] is None:
             format = int(float(format[0])), 0, format[2]
         else:
             format = int(format[0]), int(format[1]), format[2]
-        if format[2] == None:
+
+        if format[2] is None:
             format = format[:2]
 
         if is_a_dsc: