From 9a5795f9d19bf36aec77d1454a284a3f64c2802f Mon Sep 17 00:00:00 2001
From: Georg Brandl <georg@python.org>
Date: Fri, 13 Jan 2006 16:59:46 +0000
Subject: Bug #1403410: The warnings module now doesn't get confused when it
 can't find out the module name it generates a warning for.

---
 Lib/warnings.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Lib/warnings.py')

diff --git a/Lib/warnings.py b/Lib/warnings.py
index 5eac60f7c5..8baac479cd 100644
--- a/Lib/warnings.py
+++ b/Lib/warnings.py
@@ -63,7 +63,7 @@ def warn(message, category=None, stacklevel=1):
 def warn_explicit(message, category, filename, lineno,
                   module=None, registry=None):
     if module is None:
-        module = filename
+        module = filename or "<unknown>"
         if module[-3:].lower() == ".py":
             module = module[:-3] # XXX What about leading pathname?
     if registry is None:
-- 
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