diff options
| -rw-r--r-- | Lib/collections.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Lib/collections.py b/Lib/collections.py index fa9a9a0..a2ce552 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): |