python function argument type

1def pick(l: list, index: int) -> int:
2    return l[index]

1from typing import List
2
3def my_func(l: List[int]):
4    pass
5

1# For collections, the name of the type is capitalized, and the
2# name of the type inside the collection is in brackets
3x: List[int] = [1]
4x: Set[int] = {6, 7}
5  
6# For simple built-in types, just use the name of the type
7x: int = 1
8x: float = 1.0
9x: bool = True
10x: str = "test"
11x: bytes = b"test"

1def showPrompt(symbol :str, container :str) -> None:
2    while container.lower() != "exit":
3        container = str(input(symbol))