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bpo-29298: Fix crash for required subparsers in argparse #18564

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BenSokol wants to merge 3 commits into from
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bpo-29298: Fix crash for required subparsers in argparse #18564

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Fix crash for required subparsers in argparse
BenSokol Feb 19, 2020
b5b458b
Create 2020-02-20-01-53-01.bpo-29298.laIn2S.rst
BenSokol Feb 20, 2020
3b4e42b
Update Misc/NEWS.d/next/Library/2020-02-20-01-53-01.bpo-29298.laIn2S.rst
BenSokol Feb 21, 2020
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2 changes: 2 additions & 0 deletions 2 Lib/argparse.py
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Original file line number Diff line number Diff line change
Expand Up @@ -727,6 +727,8 @@ def _get_action_name(argument):
return argument.metavar
elif argument.dest not in (None, SUPPRESS):
return argument.dest
elif argument.choices not in (None, SUPPRESS):
return "{" + ','.join(argument.choices.keys()) + "}"
else:
return None

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2 changes: 2 additions & 0 deletions 2 Misc/NEWS.d/next/Library/2020-02-20-01-53-01.bpo-29298.laIn2S.rst
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@@ -0,0 +1,2 @@
Fix crash in :mod:`argparse` when using subparsers and its required attribute

@iritkatriel iritkatriel May 19, 2021

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creash means segfault, not unhandled exception.

is set to True.
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