Skip to content

Inconsistent handling of non-ASCII characters in encodings.normalize_encoding() #136736

Description

@serhiy-storchaka

Bug report

#83518 changed handling of non-ASCII characters in encodings.normalize_encoding(), but it is still inconsistent with codecs.lookup(), and not even self-consistent. For example:

>>> import encodings
>>> encodings.normalize_encoding('a¤b')
'a_b'
>>> encodings.normalize_encoding('aæb')
'ab'
>>> encodings.normalize_encoding('a-¤')
'a'
>>> encodings.normalize_encoding('a-æ')
'a_'
>>> encodings.normalize_encoding('a-¤-b')
'a_b'
>>> encodings.normalize_encoding('a-æ-b')
'a__b'

You can even get an underscore at the end or repeated underscores in the middle.

cc @malemburg, @vstinner, @shihai1991

Linked PRs

Activity

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    3.13bugs and security fixes3.14bugs and security fixes3.15pre-release feature fixes, bugs and security fixesstdlibStandard Library Python modules in the Lib/ directorytopic-unicodetype-bugAn unexpected behavior, bug, or error

    Projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions