python typing generator code example
Example 1: specify return type python function
def greeting(name: str) -> str:
return 'Hello, {}'.format(name)
Example 2: typing generator python
def infinite_stream(start: int) -> Iterator[int]:
while True:
yield start
start += 1
def infinite_stream(start: int) -> Generator[int, None, None]:
while True:
yield start
start += 1
Example 3: python optional type annotation
from custom_module import SomeClass
from typing import Optional
class SubClass:
a_reference: Optional[SomeClass]
def __init__(self):
self.a_reference = None