From: Raymond Hettinger <python@rcn.com>
Date: Mon, 21 May 2007 08:13:35 +0000 (+0000)
Subject: Replace assertion with straight error-checking.
X-Git-Tag: v2.6a1~1712
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0d6a8ccfb7b602c97fd3dd2a57eaa8138c811186;p=python

Replace assertion with straight error-checking.
---

diff --git a/Lib/collections.py b/Lib/collections.py
index fa9a9a0f8a..a2ce552ba2 100644
--- a/Lib/collections.py
+++ b/Lib/collections.py
@@ -24,7 +24,8 @@ def NamedTuple(typename, s):
     """
 
     field_names = s.split()
-    assert ''.join(field_names).replace('_', '').isalpha()      # protect against exec attacks
+    if not ''.join([typename] + field_names).replace('_', '').isalpha():
+        raise ValueError('Type names and field names can only contain alphanumeric characters and underscores')
     argtxt = ', '.join(field_names)
     reprtxt = ', '.join('%s=%%r' % name for name in field_names)
     template = '''class %(typename)s(tuple):