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gh-145410: Fix sysconfig.get_platform() for truncated sys.version on Windows #146146

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gh-145410: Fix sysconfig.get_platform() for truncated sys.version on Windows #146146

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9 changes: 7 additions & 2 deletions Lib/sysconfig/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -665,12 +665,17 @@ def get_platform():

For other non-POSIX platforms, currently just returns :data:`sys.platform`."""
if os.name == 'nt':
# Check for architecture in sys.version first, then fall back to sys.maxsize
# which is reliable even when sys.version is truncated (e.g., clang builds on Windows)
if 'amd64' in sys.version.lower():
return 'win-amd64'
if '(arm)' in sys.version.lower():
return 'win-arm32'
if sys.maxsize > 2**32:
# 64-bit Windows where sys.version may be truncated
return 'win-amd64'
if '(arm64)' in sys.version.lower():
return 'win-arm64'
if '(arm)' in sys.version.lower():
return 'win-arm32'
return sys.platform

if os.name != "posix" or not hasattr(os, 'uname'):
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