[issue31012] suggestion: allow termination argument in argparse to be specified as argument

[paul j3]

paul j3 added the comment:

The earlier issue for '--' as arguement

http://bugs.python.org/issue14364

With the patch I suggested there '-f--' and '--foo=--' work as arguments.  '--foo --' is still interpreted as a positionals switch.

In optparse parsing, a flagged option gets all the remaining strings, and consume what it needs.  In the argparse parser, strings are classed as flag and argument and '--'.  The top level allocates strings to Actions.  '--' is handled at the top level.  This difference in parsing makes it impossible to complete replicate POSIX action.

See also http://bugs.python.org/issue13922

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