https://github.com/python/cpython/commit/20438866aefc2e63949d8bb85d8f8e55633fd977
commit: 20438866aefc2e63949d8bb85d8f8e55633fd977
branch: main
author: Serhiy Storchaka <[email protected]>
committer: serhiy-storchaka <[email protected]>
date: 2026-05-15T14:34:48+03:00
summary:
gh-149801: Add IANA registered names and aliases with leading zeros (GH-149804)
Like IBM00858, CP00858, IBM01140, CP01140.
files:
A Misc/NEWS.d/next/Library/2026-05-13-23-18-39.gh-issue-149801.S_FfGr.rst
M Doc/library/codecs.rst
M Lib/encodings/aliases.py
diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
index 9259ab10d5850b..059ed2c03acfa3 100644
--- a/Doc/library/codecs.rst
+++ b/Doc/library/codecs.rst
@@ -1155,7 +1155,7 @@ particular, the following variants typically exist:
+-----------------+--------------------------------+--------------------------------+
| cp857 | 857, IBM857 | Turkish
|
+-----------------+--------------------------------+--------------------------------+
-| cp858 | 858, IBM858 | Western Europe
|
+| cp858 | 858, IBM00858 | Western Europe
|
+-----------------+--------------------------------+--------------------------------+
| cp860 | 860, IBM860 | Portuguese
|
+-----------------+--------------------------------+--------------------------------+
@@ -1192,7 +1192,7 @@ particular, the following variants typically exist:
| | |
|
| | | .. versionadded:: 3.4
|
+-----------------+--------------------------------+--------------------------------+
-| cp1140 | ibm1140 | Western Europe
|
+| cp1140 | IBM01140 | Western Europe
|
+-----------------+--------------------------------+--------------------------------+
| cp1250 | windows-1250 | Central and Eastern
Europe |
+-----------------+--------------------------------+--------------------------------+
diff --git a/Lib/encodings/aliases.py b/Lib/encodings/aliases.py
index f4b1b8dd43f920..e5e50630f33d14 100644
--- a/Lib/encodings/aliases.py
+++ b/Lib/encodings/aliases.py
@@ -71,6 +71,10 @@
# cp1140 codec
'1140' : 'cp1140',
+ 'cp01140' : 'cp1140',
+ 'csibm01140' : 'cp1140',
+ 'ebcdic_us_37_euro' : 'cp1140',
+ 'ibm01140' : 'cp1140',
'ibm1140' : 'cp1140',
# cp1250 codec
@@ -159,8 +163,12 @@
# cp858 codec
'858' : 'cp858',
+ 'cp00858' : 'cp858',
+ 'csibm00858' : 'cp858',
'csibm858' : 'cp858',
+ 'ibm00858' : 'cp858',
'ibm858' : 'cp858',
+ 'pc_multilingual_850_euro' : 'cp858',
# cp860 codec
'860' : 'cp860',
diff --git
a/Misc/NEWS.d/next/Library/2026-05-13-23-18-39.gh-issue-149801.S_FfGr.rst
b/Misc/NEWS.d/next/Library/2026-05-13-23-18-39.gh-issue-149801.S_FfGr.rst
new file mode 100644
index 00000000000000..f9e8538527d204
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-05-13-23-18-39.gh-issue-149801.S_FfGr.rst
@@ -0,0 +1,2 @@
+Add IANA registered names and aliases with leading zeros before number (like
+IBM00858, CP00858, IBM01140, CP01140) for corresponding codecs.
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