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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"bpython quits when parsing empty arguments with argparse module","articleBody":"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:\r\n\r\n```shell\r\n$ bpython\r\nbpython version 0.17.1 on top of Python 3.7.0 /usr/bin/python\r\n\u003e\u003e\u003e import argparse\r\n\u003e\u003e\u003e parser = argparse.ArgumentParser()\r\n\u003e\u003e\u003e parser.add_argument('foo')\r\n_StoreAction(option_strings=[], dest='foo', nargs=None, const=None, default=None, type=None, choices=None, help=None, metavar=None)\r\n\u003e\u003e\u003e parser.parse_args()\r\nusage: bpython [-h] foo\r\n\u003e\u003e\u003e parser.parse_args()\r\n(2,)\r\n$ echo $?\r\n1\r\n```\r\nThe second `parser.parse_args()` is not entered by me, but appears automatically on executing the first `parser.parse_args()` line.","author":{"url":"https://github.com/bfrascher","@type":"Person","name":"bfrascher"},"datePublished":"2018-08-23T10:59:41.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/745/bpython/issues/745"}