[issue15873] datetime: add ability to parse RFC 3339 dates and times

[Martin Panter]

Martin Panter added the comment:

Did you see my class attributes suggestion a couple messages back? That might solve your dispatch problem:

def _parse_isodatetime(cls, string):
    match = cls._iso_regex.match(...)

class time:
    _iso_regex = re.compile(...)

# or

time._iso_regex = re.compile(...)
date._iso_regex = ...

For the C module, start looking at /Modules/datetimemodule.c. Maybe if you can think of a similar function implemented in C to copy off. It looks like strptime() defers to a Python-only implementation; maybe that is another option.

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stage:  -> patch review

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<http://bugs.python.org/issue15873>
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