From 0f4940c0a8d2ac66ccf90fb12739967915043406 Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Sat, 1 Jun 2002 00:57:55 +0000
Subject: Replaced boolean test with 'is None'

---
 Lib/ConfigParser.py | 2 +-
 Lib/dis.py          | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Lib/ConfigParser.py b/Lib/ConfigParser.py
index e52f620..f457e72 100644
--- a/Lib/ConfigParser.py
+++ b/Lib/ConfigParser.py
@@ -270,7 +270,7 @@ class ConfigParser:
         d = self.__defaults.copy()
         d.update(sectdict)
         # Update with the entry specific variables
-        if vars:
+        if vars is not None:
             d.update(vars)
         option = self.optionxform(option)
         try:
diff --git a/Lib/dis.py b/Lib/dis.py
index 39bfb7d..8ea6d98 100644
--- a/Lib/dis.py
+++ b/Lib/dis.py
@@ -13,7 +13,7 @@ def dis(x=None):
     With no argument, disassemble the last traceback.
 
     """
-    if not x:
+    if x is None:
         distb()
         return
     if type(x) is types.InstanceType:
@@ -44,7 +44,7 @@ def dis(x=None):
 
 def distb(tb=None):
     """Disassemble a traceback (default: last traceback)."""
-    if not tb:
+    if tb is None:
         try:
             tb = sys.last_traceback
         except AttributeError:
@@ -312,12 +312,12 @@ def _test():
             fn = None
     else:
         fn = None
-    if not fn:
+    if fn is None:
         f = sys.stdin
     else:
         f = open(fn)
     source = f.read()
-    if fn:
+    if fn is not None:
         f.close()
     else:
         fn = "<stdin>"
-- 
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