Possible to call single-parameter Python function without using parentheses?

Question

The Python documentation specifies that is is legal to omit the parentheses if a function only takes a single parameter, but

    myfunction \"Hello!\"
         


        

Answer 1

As I understand the rule is only about the generator expressions... so for example: sum(x2 for x in range(10)), but you would still have to write: reduce(operator.add, (x2 for x in range(10))).

This doesn't apply for generic functions though.