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gh-133125: Clarify ZipInfo.date_time attribute documentation #136082

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gh-133125: Clarify ZipInfo.date_time attribute documentation #136082

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Clarify ZipInfo.date_time attribute documentation to specify source o…
KentaroJay Jun 28, 2025
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KentaroJay Jun 28, 2025
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18 changes: 16 additions & 2 deletions Doc/library/zipfile.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -818,7 +818,18 @@ Instances have the following methods and attributes:
.. attribute:: ZipInfo.date_time

The time and date of the last modification to the archive member. This is a
tuple of six values:
tuple of six values representing the "last mod file time" and "last mod file date"
fields from the ZIP file's central directory.

.. note::

The ZIP format supports multiple timestamp fields in different locations
(central directory, extra fields for NTFS/UNIX systems, etc.). This attribute
specifically returns the timestamp from the central directory. Future Python
versions may use alternative timestamp sources if they provide better accuracy
or precision.

The tuple contains:

+-------+--------------------------+
| Index | Value |
Expand All @@ -838,7 +849,10 @@ Instances have the following methods and attributes:

.. note::

The ZIP file format does not support timestamps before 1980.
The central directory timestamp format in ZIP files does not support
timestamps before 1980. While some extra field formats (such as UNIX
timestamps) can represent earlier dates, this attribute only returns
the central directory timestamp.


.. attribute:: ZipInfo.compress_type
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