On Mon, 11 Apr 2016 12:51 pm, Random832 wrote:
> 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.
It didn't come from any Python language feature. It is a purely internal
implementation detail.
Let me put it this way: a Python expression like 3/x-1 may be parsed into a
abstract syntax tree which might look something like this:
(OPERATOR, -,
(OPERATOR, /,
(CONSTANT, 3, None, None),
(NAME, 'x', None, None)),
(CONSTANT, 1, None, None)
)
Should we say that the / and - operators therefore create tuples? I don't
think so.
--
Steven
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