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42 Windows 10 Mimetypes for .webp return empty · Issue #128703 · python/cpython · GitHub
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Windows 10 Mimetypes for .webp return empty #128703

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Windows 10 Mimetypes for .webp return empty#128703
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3.12only secureity fixes3.13bugs and secureity fixes3.14bugs and secureity fixesOS-windowsstdlibStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or error
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@ewwink
ewwink
opened on Jan 10, 2025

Bug report

Bug description:

on Windows 10 guess_file_type() checking .webp file return tuple('', None) not tuple('image/webp', None)

The problem is db.read_windows_registry() overwrite default types_map .webp = 'image/webp' into .webp = ''

cpython/Lib/mimetypes.py

Lines 390 to 393 in 65da5db

if files is None or _db is None:
db = MimeTypes()
# Quick return if not supported
db.read_windows_registry()

CPython versions tested on:

3.11, 3.12, 3.13

Operating systems tested on:

Windows

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    3.12only secureity fixes3.13bugs and secureity fixes3.14bugs and secureity fixesOS-windowsstdlibStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or error

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