diff options
Diffstat (limited to 'Lib/collections.py')
| -rw-r--r-- | Lib/collections.py | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Lib/collections.py b/Lib/collections.py index 2a58b86..9985f93 100644 --- a/Lib/collections.py +++ b/Lib/collections.py @@ -78,7 +78,10 @@ def namedtuple(typename, field_names, verbose=False): return {%(dicttxt)s} \n def _replace(self, **kwds): 'Return a new %(typename)s object replacing specified fields with new values' - return self.__class__._make(map(kwds.get, %(field_names)r, self)) \n\n''' % locals() + result = self.__class__._make(map(kwds.pop, %(field_names)r, self)) + if kwds: + raise ValueError('Got unexpected field names: %%r' %% kwds.keys()) + return result \n\n''' % locals() for i, name in enumerate(field_names): template += ' %s = property(itemgetter(%d))\n' % (name, i) if verbose: |