[issue18896] Remove namedtuple 255 arguments restriction

[Alori]

Alori added the comment:

@pitrou:
Thank you for your answer.
I agree they should not replace databases or files, but I think 255 is just way too lightweight. It feels unnatural to have this limitation for no specific reason. 

Recently, I've seen a lot of solutions that emulate the namedtuple functionality with some classes in order to workaround this issue, but they all feel "forced" and require some unsavory hacks.

I think namedtuple is one the most useful structures in the language, and like tuples and dicts, shouldn't be limited by design.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18896>
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