New submission from SilentGhost:
If you run attached file w/ 3.2 and 3.3 (and later) versions, you'll notice
that the new version of parser doesn't handle empty argument list:
$ python3.2 test.py
usage: test.py [-h] {demo} ...
test.py: error: too few arguments
$ python3.3 test.py
Namespace()
Everything is naturally failing in 3.3 version as the execution continues with
the empty Namespace. I suspect this is due to the issue10424 that removed
explicit check for positionals.
----------
components: Library (Lib)
files: test.py
keywords: 3.3regression
messages: 188228
nosy: SilentGhost, bethard, maker, r.david.murray
priority: normal
severity: normal
status: open
title: argparse subparsers break without without argument
type: behavior
versions: Python 3.3, Python 3.4
Added file: http://bugs.python.org/file30095/test.py
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<http://bugs.python.org/issue17889>
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