reflection.py 文件源码

def is_same_callback(callback1, callback2, strict=True):
    """Returns if the two callbacks are the same."""
    if callback1 is callback2:
        # This happens when plain methods are given (or static/non-bound
        # methods).
        return True
    if callback1 == callback2:
        if not strict:
            return True
        # Two bound methods are equal if functions themselves are equal and
        # objects they are applied to are equal. This means that a bound
        # method could be the same bound method on another object if the
        # objects have __eq__ methods that return true (when in fact it is a
        # different bound method). Python u so crazy!
        try:
            self1 = six.get_method_self(callback1)
            self2 = six.get_method_self(callback2)
            return self1 is self2
        except AttributeError:  # nosec
            pass
    return False