[issue24223] argparse parsing (mingling --option and optional positional argument)

2015-05-21 Thread Bob Alexander

Bob Alexander added the comment:

Thanks for the note, Martin. I agree that it's a duplicate. (I had done a
brief search for possible dups, but didn't find that one!)

Bob

On Sun, May 17, 2015 at 8:29 PM, Martin Panter rep...@bugs.python.org
wrote:


 Martin Panter added the comment:

 I suggest this is a duplicate of Issue 15112. The same problem also
 happens with nargs=*, and that issue apparently has a patch to handle
 both cases.

 For the record, this is the resulting error, and a demo that it works if
 the option comes before the positional arguments:

  print(test 2:, ap.parse_args([abc, --option, mmm]))
 usage: [-h] [--option] arg_1 [arg_2]
 : error: unrecognized arguments: mmm
 Traceback (most recent call last):
   File stdin, line 1, in module
   File /home/proj/python/cpython/Lib/argparse.py, line 1729, in
 parse_args
 self.error(msg % ' '.join(argv))
   File /home/proj/python/cpython/Lib/argparse.py, line 2385, in error
 self.exit(2, _('%(prog)s: error: %(message)s\n') % args)
   File /home/proj/python/cpython/Lib/argparse.py, line 2372, in exit
 _sys.exit(status)
   File /home/pythonstartup.py, line 345, in exit
 raise SystemExit(code)
 __main__.SystemExit: 2
  ap.parse_args([--option, abc, mmm])
 Namespace(arg_1='abc', arg_2='mmm', option=True)

 --
 nosy: +vadmium
 resolution:  - duplicate
 stage:  - resolved
 status: open - closed
 superseder:  - argparse: nargs='*' positional argument doesn't accept any
 items if preceded by an option and another positional
 title: argparse parsing bug - argparse parsing (mingling --option and
 optional positional argument)

 ___
 Python tracker rep...@bugs.python.org
 http://bugs.python.org/issue24223
 ___


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[issue24223] argparse parsing (mingling --option and optional positional argument)

2015-05-17 Thread Martin Panter

Martin Panter added the comment:

I suggest this is a duplicate of Issue 15112. The same problem also happens 
with nargs=*, and that issue apparently has a patch to handle both cases.

For the record, this is the resulting error, and a demo that it works if the 
option comes before the positional arguments:

 print(test 2:, ap.parse_args([abc, --option, mmm]))
usage: [-h] [--option] arg_1 [arg_2]
: error: unrecognized arguments: mmm
Traceback (most recent call last):
  File stdin, line 1, in module
  File /home/proj/python/cpython/Lib/argparse.py, line 1729, in parse_args
self.error(msg % ' '.join(argv))
  File /home/proj/python/cpython/Lib/argparse.py, line 2385, in error
self.exit(2, _('%(prog)s: error: %(message)s\n') % args)
  File /home/proj/python/cpython/Lib/argparse.py, line 2372, in exit
_sys.exit(status)
  File /home/pythonstartup.py, line 345, in exit
raise SystemExit(code)
__main__.SystemExit: 2
 ap.parse_args([--option, abc, mmm])
Namespace(arg_1='abc', arg_2='mmm', option=True)

--
nosy: +vadmium
resolution:  - duplicate
stage:  - resolved
status: open - closed
superseder:  - argparse: nargs='*' positional argument doesn't accept any 
items if preceded by an option and another positional
title: argparse parsing bug - argparse parsing (mingling --option and optional 
positional argument)

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