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

[Alexander Belopolsky]

Alexander Belopolsky added the comment:

Please move _parse_isotime to _strptime so that it can be called from C implementation.  Also, the new method should be documented.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue15873>
_______________________________________