Jacopo Nespolo added the comment:
Ned Deily: I don't quite know how to use unittest, but I'll try to look into it.
paul j3:
> There I proposed leaving '_negative_number_matcher' unchanged,
> but only use it to set '_has_negative_number_optionals'.
I don't know argparse internals but, if I understand your argument, I think you
still need a '_negative_number_matcher' capable of correctly match any negative
number in any form, including scientific notation, complex j, etc..
If this is the case, then, the matcher could be simplified to something like
'^-\d+|^-.\d+'
(notice $ removed from current regex) which would only signal that "something
that starts like a negative number" is present.
Then one could use complex() or float() or whatever, to check that that's
actually the case.
I would still expect an exception to be raised if, say, I specify type=float
and then a complex value is passed as an argument.
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<http://bugs.python.org/issue22672>
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