Function annotation in python 3 get “name not defined” error

Question

I am trying to use python3 type annotation features.

Here is some toy functions without annotation:

def fa(func, *args):
    return func(*args)
def fb(x:         


        

Answer 1

As the error message tells you, the name function isn't defined. If you want to hint as a function, put it in quotes:

def fa(func: 'function', *args):

Answer 2

Because you define a variable in function parameters,but that parameter is not exist out of function.You have to write

fa(function="Newton")