Lucas Cimon <lucas.ci...@gmail.com> added the comment:
Reporting a duplicate / superseder with the following bug:
parser = argparse.ArgumentParser()
subparsers = parser.add_subparsers(required=True)
subparsers.add_parser('foo')
parser.parse_args()
Raising:
TypeError: sequence item 0: expected str instance, NoneType found
It has already been reported in https://bugs.python.org/issue29298
with an interesting solution by Greg Minshall.
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nosy: +Lucas Cimon
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33109>
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