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[3.11] gh-105031: Clarify datetime documentation for ISO8601 (GH-105049) #114867

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Feb 1, 2024
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[3.11] gh-105031: Clarify datetime documentation for ISO8601 (GH-105049) #114867

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18 changes: 15 additions & 3 deletions Doc/library/datetime.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -536,7 +536,15 @@ Other constructors, all class methods:
.. classmethod:: date.fromisoformat(date_string)

Return a :class:`date` corresponding to a *date_string* given in any valid
ISO 8601 format, except ordinal dates (e.g. ``YYYY-DDD``)::
ISO 8601 format, with the following exceptions:

1. Reduced precision dates are not currently supported (``YYYY-MM``,
``YYYY``).
2. Extended date representations are not currently supported
(``±YYYYYY-MM-DD``).
3. Ordinal dates are not currently supported (``YYYY-OOO``).

Examples::

>>> from datetime import date
>>> date.fromisoformat('2019-12-04')
Expand Down Expand Up @@ -1006,8 +1014,12 @@ Other constructors, all class methods:

1. Time zone offsets may have fractional seconds.
2. The ``T`` separator may be replaced by any single unicode character.
3. Ordinal dates are not currently supported.
4. Fractional hours and minutes are not supported.
3. Fractional hours and minutes are not supported.
4. Reduced precision dates are not currently supported (``YYYY-MM``,
``YYYY``).
5. Extended date representations are not currently supported
(``±YYYYYY-MM-DD``).
6. Ordinal dates are not currently supported (``YYYY-OOO``).

Examples::

Expand Down