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gh-149801: Add IANA registered names and aliases with leading zeros #149804

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gh-149801: Add IANA registered names and aliases with leading zeros #149804

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4 changes: 2 additions & 2 deletions Doc/library/codecs.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1155,7 +1155,7 @@ particular, the following variants typically exist:
+-----------------+--------------------------------+--------------------------------+
| cp857 | 857, IBM857 | Turkish |
+-----------------+--------------------------------+--------------------------------+
| cp858 | 858, IBM858 | Western Europe |
| cp858 | 858, IBM00858 | Western Europe |
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@serhiy-storchaka serhiy-storchaka May 13, 2026

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I have not added all existing aliases (see #42237), just changed the documented ones to officially registered names.

+-----------------+--------------------------------+--------------------------------+
| cp860 | 860, IBM860 | Portuguese |
+-----------------+--------------------------------+--------------------------------+
Expand Down Expand Up @@ -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 |
+-----------------+--------------------------------+--------------------------------+
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8 changes: 8 additions & 0 deletions Lib/encodings/aliases.py
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Expand Up @@ -71,6 +71,10 @@

# cp1140 codec
'1140' : 'cp1140',
'cp01140' : 'cp1140',
'csibm01140' : 'cp1140',
'ebcdic_us_37_euro' : 'cp1140',
'ibm01140' : 'cp1140',
'ibm1140' : 'cp1140',

# cp1250 codec
Expand Down Expand Up @@ -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',
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2026-05-13-23-18-39.gh-issue-149801.S_FfGr.rst
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Original file line number Diff line number Diff line change
@@ -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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