commit 094662a16542d1cc56713b35dde39089490dec35
author Raymond Hettinger <python@rcn.com> Sat Jun 01 01:29:16 2002 +0000
committer Raymond Hettinger <python@rcn.com> Sat Jun 01 01:29:16 2002 +0000
tree eb433a4bebe8dc9eb28de9f7655f8fab24498a52
parent 0f4940c0a8d2ac66ccf90fb12739967915043406

Replace boolean test with is None

Lib/formatter.py

diff --git a/Lib/formatter.py b/Lib/formatter.py
index 75f4718..ccbbdf1 100644
--- a/Lib/formatter.py
+++ b/Lib/formatter.py
@@ -38,7 +38,7 @@
     """
 
     def __init__(self, writer=None):
-        if not writer:
+        if writer is None:
             writer = NullWriter()
         self.writer = writer
     def end_paragraph(self, blankline): pass
@@ -433,7 +433,7 @@
 def test(file = None):
     w = DumbWriter()
     f = AbstractFormatter(w)
-    if file:
+    if file is not None:
         fp = open(file)
     elif sys.argv[1:]:
         fp = open(sys.argv[1])