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Kirill Smelkov
cpython
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085556ae
Commit
085556ae
authored
Jan 10, 2011
by
Alexander Belopolsky
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Improved description of %Y directive.
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262cc7f6
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Doc/library/datetime.rst
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Doc/library/datetime.rst
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085556ae
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@@ -1661,10 +1661,6 @@ version) requires, and these work on all platforms with a standard C
implementation. Note that the 1999 version of the C standard added additional
format codes.
The exact range of years for which :meth:`strftime` works also varies
across platforms. Regardless of platform, years before 1000 cannot be
used with ``datetime`` module ``strftime()`` methods.
+-----------+--------------------------------+-------+
| Directive | Meaning | Notes |
+===========+================================+=======+
...
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@@ -1737,10 +1733,11 @@ used with ``datetime`` module ``strftime()`` methods.
| ``%y`` | Year without century as a | |
| | decimal number [00,99]. | |
+-----------+--------------------------------+-------+
| ``%Y`` | Year with century as a decimal | |
| | number. | |
| ``%Y`` | Year with century as a decimal | \(5) |
| | number [0001,9999] (strptime), | |
| | [1000,9999] (strftime). | |
+-----------+--------------------------------+-------+
| ``%z`` | UTC offset in the form +HHMM | \(
5
) |
| ``%z`` | UTC offset in the form +HHMM | \(
6
) |
| | or -HHMM (empty string if the | |
| | the object is naive). | |
+-----------+--------------------------------+-------+
...
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@@ -1772,6 +1769,18 @@ Notes:
calculations when the day of the week and the year are specified.
(5)
For technical reasons, :meth:`strftime` method does not support
dates with year < 1000: ``t.strftime(format)`` will raise a
:exc:`ValueError` even if ``format`` does not contain ``%Y``
directive. The :meth:`strptime` method can parse years in the full
[1, 9999] range, but years < 1000 must be zero-filled to 4-digit
width.
.. versionchanged:: 3.2
In previous versions, :meth:`strftime` method was restricted to
years >= 1900.
(6)
For example, if :meth:`utcoffset` returns ``timedelta(hours=-3, minutes=-30)``,
``%z`` is replaced with the string ``'-0330'``.
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