argparse.FileType is deprecated in Python 3.14

This now raises PendingDeprecationWarning:

charset_normalizer/src/charset_normalizer/cli/__main__.py

Line 62 in 0237181

"files", type=argparse.FileType("rb"), nargs="+", help="File(s) to be analysed"

and because of this setting for pytest:

Lines 62 to 64 in 0237181

    
           filterwarnings = [ 
        
               "error", 
        
           ]

I think it will cause the test suite to fail with 3.14. I experienced this in Fedora Linux, where we are already preparing Python 3.14.

See this for more context: python/cpython#58032

🚨 fix CPython 3.14 deprecation warning for argparse.FileType

OK. We just landed a patch in the main branch that should help with this.
Unfortunately we won't be able to issue a release until CPython 3.14 reach RC1 as more deprecations or changes may occurs until then.

Regards,

Thank you!

chore(deps): update dependency charset-normalizer to v3.4.2 (#128)

fix(deps): update dependency charset-normalizer to v3.4.2 (#332)

chore(deps): update dependency charset-normalizer to v3.4.4 (#73)

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`argparse.FileType` is deprecated in Python 3.14 #591

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argparse.FileType is deprecated in Python 3.14 #591

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Ousret commented on Jan 26, 2025

frenzymadness commented on Jan 27, 2025

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`argparse.FileType` is deprecated in Python 3.14 #591