Folks. There are standards. "1252" *is not* an alias for "windows-1252" according to the IANA, while "866" *is* an alias for "IBM866" according to the same authority. Most 3-digit "IBMxxx" ARE aliased to both "cpxxx" and just "xxx", but not all. None of "IBM874", "874", or "cp874" exists according to the IANA.
https://www.iana.org/assignments/character-sets/character-sets.xhtml For the reasons Steven gave, I would say omit the digits-only aliases, but if we must use them because "there's a standard" (or backward compatibility), we should stick to those defined by standard, and only those. If we're following other standards that I'm unaware of, fine, but let's cite them rather than randomly introduce a plethora of aliases because they "look like" an existing (and unfortunate) standard. There's also some other weirdness with "windows-874", see below. We (somebody) should check other "windows-xxx" character sets to make sure they're not misnamed "cpxxx". Steven D'Aprano writes: > > It is easy to test it. Encoding/decoding with '874' should give the > > same result as with 'cp874'. > > I know it is too late to remove that feature, but why do we support > digit-only IDs for encodings? They can be ambiguous. If Wikipedia is > correct, cp874 (also known as ibm874) and Windows-874 (also known as > cp1162) are different: According to the IANA, they're not necessarily ambiguous. Here is the entry for IBM866: IBM866 2086 IBM NLDG Volume 2 cp866 (SE09-8002-03) August 1994 866 [Rick_Pond] csIBM866 where the entries in column 4 show the registered aliases. There are at least a dozen IBMxxx character sets with 'xxx' aliases. I don't understand what's with "cp874", though. We can surely take that one back, although we'd better hurry if it's in 3.7rc. We might want to add "windows-874" (which does't seem to be present in Python 3.6), since that's the standard character set name per IANA. The confusion between cp874 and windows-874 may be because in VENDORS/MICSFT/WINDOWS it's in CP874.TXT (as are all the code pages there). > https://en.wikipedia.org/wiki/ISO/IEC_8859-11#Code_page_874 > > https://en.wikipedia.org/wiki/ISO/IEC_8859-11#Code_page_1162 I don't know where Wikipedia's information comes from, but it's not the IANA. -- Associate Professor Division of Policy and Planning Science http://turnbull.sk.tsukuba.ac.jp/ Faculty of Systems and Information Email: turnb...@sk.tsukuba.ac.jp University of Tsukuba Tel: 029-853-5175 Tennodai 1-1-1, Tsukuba 305-8573 JAPAN _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/