R. David Murray <rdmur...@bitdance.com> added the comment:

I think you misunderstand the way that python arguments work.  If you have a 
function so:

  def func(size=None):

Then func(0) and func(size=0) are equivalent, and func(0, size=0) is a 
TypeError because you've provided two arguments instead of just one.  The C 
code *can* emulate this, but often doesn't (it just accepts positional 
arguments instead).  An issue was raised about changing most C functions to 
support the keyword syntax, but I believe it was decided that while in general 
doing so is good we'd only do it on a case by case basis as they came up.  See 
issue 8706 for more details.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue14586>
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