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gh-99308: Clarify re docs for byte pattern group names by Kentzo · Pull Request #99311 · python/cpython · GitHub

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gh-99308: Clarify re docs for byte pattern group names #99311

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Merged
kumaraditya303 merged 3 commits into from
Dec 25, 2022
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gh-99308: Clarify re docs for byte pattern group names #99311

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002af29
gh-99308: Fix wording of the deprecation notice in re for 3.12
Kentzo Nov 10, 2022
0aa2260
gh-99308: Fix typos and make wording consistent
Kentzo Nov 30, 2022
65b9453
gh-99308: Fix missing dot.
Kentzo Nov 30, 2022
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16 changes: 9 additions & 7 deletions Doc/library/re.rst
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Expand Up @@ -395,9 +395,9 @@ The special characters are:
``(?P<name>...)``
Similar to regular parentheses, but the substring matched by the group is
accessible via the symbolic group name *name*. Group names must be valid
Python identifiers, and in bytes patterns they must contain only characters
in the ASCII range. Each group name must be defined only once within a
regular expression. A symbolic group is also a numbered group, just as if
Python identifiers, and in :class:`bytes` patterns they can only contain
bytes in the ASCII range. Each group name must be defined only once within
a regular expression. A symbolic group is also a numbered group, just as if
the group were not named.

Named groups can be referenced in three contexts. If the pattern is
Expand All @@ -419,8 +419,8 @@ The special characters are:
+---------------------------------------+----------------------------------+

.. versionchanged:: 3.12
In bytes patterns group names must contain only characters in
the ASCII range.
In :class:`bytes` patterns, group *name* can only contain bytes
in the ASCII range (``b'\x00'``-``b'\x7f'``).

.. index:: single: (?P=; in regular expressions

Expand Down Expand Up @@ -496,6 +496,8 @@ The special characters are:

.. versionchanged:: 3.12
Group *id* can only contain ASCII digits.
In :class:`bytes` patterns, group *name* can only contain bytes
in the ASCII range (``b'\x00'``-``b'\x7f'``).


The special sequences consist of ``'\'`` and a character from the list below.
Expand Down Expand Up @@ -1018,8 +1020,8 @@ Functions

.. versionchanged:: 3.12
Group *id* can only contain ASCII digits.
In bytes replacement strings group names must contain only characters
in the ASCII range.
In :class:`bytes` replacement strings, group *name* can only contain bytes
in the ASCII range (``b'\x00'``-``b'\x7f'``).


.. function:: subn(pattern, repl, string, count=0, flags=0)
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