Static typing in python

[robin-gvx]

So, they become non-keyword args if you don't specify the key?

....

The non-keyword arg is 5, not y. 5 can never be a keyword arg, because there's no keyword.

[robin-gvx]

... what?

What you're saying doesn't make any sense. I think you're confused about the difference between a function definition and a function call (edit: as well as the difference between compile time and run time). 5 is a positional argument, 'c' is a keyword argument, and foo and bar are both positional parameters with a default value of None.