Message 243983 - Python tracker

Affect on performance:

$ ./python -m timeit -r 11 -s "from collections import namedtuple as n;a = n('n', 'a b c')(1, 2, 3)"

Unpatched: 10000000 loops, best of 11: 0.0567 usec per loop
Patched  : 10000000 loops, best of 11: 0.0567 usec per loop