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bpo-40280: Change subprocess imports for cleaner error on wasm32 (GH-30620) by tiran · Pull Request #30620 · python/cpython · GitHub

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bpo-40280: Change subprocess imports for cleaner error on wasm32 (GH-30620) #30620

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Merged
tiran merged 2 commits into from
Jan 17, 2022
Conversation 8 Commits 2 Checks 0 Files changed
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bpo-40280: Change subprocess imports for cleaner error on wasm32 (GH-30620) #30620

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bpo-40280: Change subprocess imports for cleaner error on wasm32-emsc…
tiran Jan 16, 2022
a11e6d8
Reformat blurb
tiran Jan 16, 2022
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15 changes: 7 additions & 8 deletions Lib/subprocess.py
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Original file line number Diff line number Diff line change
Expand Up @@ -65,16 +65,11 @@
# NOTE: We intentionally exclude list2cmdline as it is
# considered an internal implementation detail. issue10838.

try:
_mswindows = sys.platform == "win32"

if _mswindows:
import msvcrt
import _winapi
_mswindows = True
except ModuleNotFoundError:
_mswindows = False
import _posixsubprocess
import select
import selectors
else:
from _winapi import (CREATE_NEW_CONSOLE, CREATE_NEW_PROCESS_GROUP,
STD_INPUT_HANDLE, STD_OUTPUT_HANDLE,
STD_ERROR_HANDLE, SW_HIDE,
Expand All @@ -95,6 +90,10 @@
"NORMAL_PRIORITY_CLASS", "REALTIME_PRIORITY_CLASS",
"CREATE_NO_WINDOW", "DETACHED_PROCESS",
"CREATE_DEFAULT_ERROR_MODE", "CREATE_BREAKAWAY_FROM_JOB"])
else:
import _posixsubprocess
import select
import selectors


# Exception classes used by this module.
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4 changes: 4 additions & 0 deletions Misc/NEWS.d/next/Library/2022-01-16-14-07-14.bpo-40280.LtFHfF.rst
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@@ -0,0 +1,4 @@
:mod:`subprocess` now imports Windows-specific imports when
``sys.platform == "win32"`` and POSIX-specific imports on all other
platforms. This gives a clean exception when ``_posixsubprocess`` is not
available (e.g. Emscripten browser target) and it's slightly faster, too.
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