Parens do create a tuple

Sun Apr 10 22:51:35 EDT 2016

On Sun, Apr 10, 2016, at 22:32, Steven D'Aprano wrote:
> def func(arg1, arg2, arg3):
> pass
>> func(1, 2, 3) 
>> does not create a tuple (1, 2, 3) anywhere in its execution.

Well, the second argument to PyObject_Call and function_call is a tuple,
which had to come from somewhere. That may be a CPython implementation
detail, but what else could __call__'s prototype be but (self, *args,
**kwargs)?
> Live by pedantry, die by pedantry.