commit 16e3c427f35589ac3b83e8c13a8ec6495ec6cfa1
author Raymond Hettinger <python@rcn.com> Sat Jun 01 16:07:16 2002 +0000
committer Raymond Hettinger <python@rcn.com> Sat Jun 01 16:07:16 2002 +0000
tree d48f5e5b73a5124cabe347106a331ad8085c0064
parent 793d4b49361a010e4baa485ec77e3adc430f0236

Replace boolean test with is None.

Lib/poplib.py

diff --git a/Lib/poplib.py b/Lib/poplib.py
index 0525043..0b22b2e 100644
--- a/Lib/poplib.py
+++ b/Lib/poplib.py
@@ -220,7 +220,7 @@
         Result when a message number argument is given is a
         single response: the "scan listing" for that message.
         """
-        if which:
+        if which is not None:
             return self._shortcmd('LIST %s' % which)
         return self._longcmd('LIST')
 
@@ -313,7 +313,7 @@
         in the form 'response mesgnum uid', otherwise result is
         the list ['response', ['mesgnum uid', ...], octets]
         """
-        if which:
+        if which is not None:
             return self._shortcmd('UIDL %s' % which)
         return self._longcmd('UIDL')