typing python Dict code example

Example 1: dict typing python

from typing import dict
my_dict :dict[key_type, value_type] ={}
# Exemple:
dict1 :dict[str, int] = {
  "zero" : 0,
  "one"  : 1,
  "two"  : 3
}

Example 2: python typing list of strings

from typing import List

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

Example 3: typing generator python

# Iterator
def infinite_stream(start: int) -> Iterator[int]:
    while True:
        yield start
        start += 1

# Generator        
def infinite_stream(start: int) -> Generator[int, None, None]:
    while True:
        yield start
        start += 1

Example 4: python type hint list

# 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"