Fix namedtuple bug reported by Glenn Linderman. Template did not form correctly…

Fix namedtuple bug reported by Glenn Linderman.  Template did not form correctly if the field names were input in Unicode.

Lib/collections.py

@@ -38,7 +38,7 @@ def namedtuple(typename, field_names, verbose=False):
     # generating informative error messages and preventing template injection attacks.
     if isinstance(field_names, basestring):
         field_names = field_names.replace(',', ' ').split() # names separated by whitespace and/or commas
-    field_names = tuple(field_names)
+    field_names = tuple(map(str, field_names))
     for name in (typename,) + field_names:
         if not all(c.isalnum() or c=='_' for c in name):
             raise ValueError('Type names and field names can only contain alphanumeric characters and underscores: %r' % name)

Lib/test/test_collections.py

@@ -34,6 +34,11 @@ class TestNamedTuple(unittest.TestCase):
         namedtuple('Point0', 'x1 y2')   # Verify that numbers are allowed in names
         namedtuple('_', 'a b c')        # Test leading underscores in a typename
 
+        nt = namedtuple('nt', u'the quick brown fox')                       # check unicode input
+        self.assert_("u'" not in repr(nt._fields))
+        nt = namedtuple('nt', (u'the', u'quick'))                           # check unicode input
+        self.assert_("u'" not in repr(nt._fields))
+
         self.assertRaises(TypeError, Point._make, [11])                     # catch too few args
         self.assertRaises(TypeError, Point._make, [11, 22, 33])             # catch too many args