[issue2909] struct.Struct.unpack to return a namedtuple for easier attribute access

[Aaron Gallagher]

Aaron Gallagher <habnabit at gmail.com> added the comment:

Okay, here's a new version of my patch. Instead of replacing the default 
functionality of struct.Struct, this patch now adds the functionality to a 
separate class called NamedStruct, so as to not break backwards 
compatibility. The coding style has been revised, and it now also raises a 
more descriptive error if the regex fails to parse. Also included: a unit 
test.

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versions: +Python 2.6
Added file: http://bugs.python.org/file10374/named-struct2.patch

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