what is ,*, ?

[hbknjr]

I always thought * was for unpacking, but that's surely not the case here.

I looked at sorted function code didn't find any use of *(except for the pointers in C).

May be it is to differentiate positional or keyword arguments. func(positional args,*, keyword args)

may be to represent that after ,*, no positional argument could be there.

Just a theory, let me know if you find a counter-example.

---

Ok so i tried to use ,*, in function defination and all it did is convert the argument on right to keyword argument.

>>> def myFunction(a, *, b):
...     return a+b
...
>>> myFunction(3,5)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: myFunction() takes 1 positional argument but 2 were given

>>> myFunction(3,b=5)
8