python function argument type

def showPrompt(symbol :str, container :str) -> None:
    while container.lower() != "exit":
        container = str(input(symbol))

# For collections, the name of the type is capitalized, and the
# name of the type inside the collection is in brackets
x: List[int] = [1]
x: Set[int] = {6, 7}
  
# For simple built-in types, just use the name of the type
x: int = 1
x: float = 1.0
x: bool = True
x: str = "test"
x: bytes = b"test"

from typing import List

def my_func(l: List[int]):
    pass

def pick(l: list, index: int) -> int:
    return l[index]