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bpython quits when parsing empty arguments with argparse module · Issue #745 · bpython/bpython · GitHub
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bpython quits when parsing empty arguments with argparse module #745

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Description

I was testing around some things with the argparse module in bpython when suddenly bpython quit on me with error code 1. I tried to break the problem down and the code below seems to be the minimal reproducer:

$ bpython bpython version 0.17.1 on top of Python 3.7.0 /usr/bin/python >>> import argparse >>> parser = argparse.ArgumentParser() >>> parser.add_argument('foo') _StoreAction(option_strings=[], dest='foo', nargs=None, const=None, default=None, type=None, choices=None, help=None, metavar=None) >>> parser.parse_args() usage: bpython [-h] foo >>> parser.parse_args() (2,) $ echo $? 1

The second parser.parse_args() is not entered by me, but appears automatically on executing the first parser.parse_args() line.

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