python中not not x 与bool(x) 的区别

>>> x = 123
>>> not not x
True
>>> bool(x)
True
>>>

import timeit


def bool_convert(x):
    return bool(x)


def notnot_convert(x):
    return not not x


def main():
    trials = 10_000_000
    kwargs = {
        "setup": "x=42",
        "globals": globals(),
        "number": trials,
    }

    notnot_time = timeit.timeit("notnot_convert(x)", **kwargs)
    bool_time = timeit.timeit("bool_convert(x)", **kwargs)

    print(f"{bool_time = :.04f}")
    print(f"{notnot_time = :.04f}")


if __name__ == "__main__":
    main()

LOAD_GLOBAL(namei)
Loads the global named co_names[namei] onto the stack.

CALL_FUNCTION(argc)
Calls a callable object with positional arguments. argc indicates the number of positional arguments. The top of the stack contains positional arguments, with the right-most argument on top. Below the arguments is a callable object to call. CALL_FUNCTION pops all arguments and the callable object off the stack, calls the callable object with those arguments, and pushes the return value returned by the callable object.

UNARY_NOT
Implements TOS = not TOS.