[issue16418] argparse with many choices can generate absurdly long usage message
Terry J. Reedy
report at bugs.python.org
Sun Nov 11 18:53:22 CET 2012
Terry J. Reedy added the comment:
Juraj: Is the example behavior from Py2 or Py3? The meaning of 'range' changed. In Py2, xrange would be the correct choice for 'choice'.
Does argparse actually convert (x)range objects to a list or set (the help indicates the latter) for internal use? That would be foolish as 'n in <range>' is an O(1) operation. (I don't remember is that works for xrange.) For instance, range(0, 1000, 2) is a nice way to say 'even count less than 1000'.
If it is not so converted, converting for display is also foolish.
'range(0, 1000, 2)' is clearer than an explicit sequence.
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nosy: +bethard, terry.reedy
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<http://bugs.python.org/issue16418>
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