Re: [Python-Dev] TypeError: f() missing 1 required positional argument: 'x'

2012/9/20 Mark Dickinson dickinsm@gmail.com:

And excepting optional ones, too, right? E.g., the c in

def foo(a, b, c=1, *args, d):
    pass

can be passed to by position, but isn't "positional".

Why not?

...

...

def f(a, b, c=3): pass

...

...

...

f()

Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: f() missing 2 required positional arguments: 'a' and 'b'

...

...

f(1, 2, 3, 4)

Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: f() takes from 2 to 3 positional arguments but 4 were given