Type Hint বিস্তারিত

def greet(name: str) -> str:
    return f'Hello, {name}!'

age: int = 28
price: float = 19.99
is_active: bool = True

names: list[str] = ['Sam', 'Alex']
scores: dict[str, int] = {'Sam': 90, 'Alex': 85}
coordinates: tuple[float, float] = (12.5, 45.2)

from typing import Optional

def find_user(user_id: int) -> Optional[str]:
    # একটা username return করে, বা না পাওয়া গেলে None
    ...

# Python 3.10+ shorthand, কোনো import দরকার নেই:
def find_user(user_id: int) -> str | None:
    ...

def process(value: int | str) -> str:
    return str(value)

from typing import Callable

def apply(func: Callable[[int], int], value: int) -> int:
    return func(value)

pip install mypy
mypy my_script.py
# my_script.py:5: error: Argument 1 to "greet" has incompatible type "int"; expected "str"