Python functions

Question

Why are functions written like this
def customer (Id : int, phone : int) -> int

What's the use of the colon in the argument?
Why is there a -> int at the function declaration?

Answer 1

Slick I don't know for sure either, but I think this is the return type.

Answer 2

Yup, seems like you coulda done that from the start, instead of letting us do that for you and then marking your own answer as best.

Answer 3

the ": int" part is just to tell someone who's going over the code what type the parameter is. similar to c declaration

void print_somethin(char *buffer)

except the type is after. no idea about the "-> int"

EDIT: just looked it up and Gᑌᗰᗷᗩᒪᒪ is right!

Answer 4

Sudo

Ok according to this module, Id and phone are arguments and int is type of both arguments and -> int is return type.

Answer 5

I just checked it up and id : int is type hint while -> int is return type
Thanks Gᑌᗰᗷᗩᒪᒪ Slick

Answer 6

Is this a python functions syntax. If so then in which version because I didn't find this type of function definition in python.

Answer 7

A͢J it's a syntax accompanied by typing module