Define a function

Defining a function that takes 2 integer arguments and returns its sum.

Python

def add(a, b):
    """Adds a to b"""
    return a + b

Python with typing annotations

It looks more similar to Rust.

def add(a: int, b: int) -> int:
    """Adds a to b"""
    return a + b

Rust

#![allow(unused)]
fn main() {
/// Adds a to b
fn add(a: i32, b: i32) -> i32 {
  a + b
}
}