Terry J. Reedy added the comment:
This is a nice catch of a subtle bug and a nice fix. I verified that replacing
'self' with '*args' does not simply shift the problem from 'self' to 'args'.
>>> class C:
def test(*args, **kwargs):
print(args, kwargs )
>>> c = C()
>>> c.test(1, args=2, kwargs=3, self=4)
(<__main__.C object at 0x00000000035FE128>, 1) {'args': 2, 'kwargs': 3, 'self':
4}
While the * and ** names are, like parameter names, local names given in the
signature header, they are not counted as parameter names in the code object
.co_argcount or .co_kwonlyargcount attributes that are used along with
co_varnames in the name-argument matching process.
----------
nosy: +terry.reedy
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<http://bugs.python.org/issue23671>
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