For variable positional arguments (*args
) and variable keyword arguments (**kw
) you only need to specify the expected value for one such argument.
From the Arbitrary argument lists and default argument values section of the Type Hints PEP:
Arbitrary argument lists can as well be type annotated, so that the definition:
def foo(*args: str, **kwds: int): ...
is acceptable and it means that, e.g., all of the following represent function calls with valid types of arguments:
foo('a', 'b', 'c') foo(x=1, y=2) foo('', z=0)
So you’d want to specify your method like this:
def foo(*args: int):
However, if your function can only accept either one or two integer values, you should not use *args
at all, use one explicit positional argument and a second keyword argument:
def foo(first: int, second: Optional[int] = None):
Now your function is actually limited to one or two arguments, and both must be integers if specified. *args
always means 0 or more, and can’t be limited by type hints to a more specific range.