mypy-play

age: int = 25
nom: str = "Mehdi"
moyenne: float = 15.5

age = "vingt-cinq"
nom = 42
moyenne = "excellent"

mypy-play

def func_with_kw_only(x: int, *, y: int = 0):
    return x + y
    
def func_with_pos_only(x: int, y: int, /):
    return x + y
    
    
func_with_kw_only(1)  # OK
func_with_kw_only(1, y=2)  # OK
func_with_kw_only(1, 2)  # error: Too many positional arguments for "func_with_kw_only"  [call-arg]

mypy-play

from collections.abc import Callable

class Animal: ...
class Dog(Animal):
    def bark(self) -> None: print("woof")
class Cat(Animal): ...

class Handler[T]:
    def __init__(self, cb: Callable[[T], None]) -> None:
        self.cb = cb

mypy-play

def foo(a_type: type) -> None:
    reveal_type(a_type) # N: Revealed type is "builtins.type"
    class Sub(a_type): pass

mypy-play

class Person():
    def __init__(self, name: str, age: int, characteristics: type):
      self.name = name
      self.age = age
      self.characteristics = characteristics

def foo(person: Person) -> None:
    reveal_type(person.characteristics) # N: Revealed type is "builtins.type"
    class Sub(person.characteristics): pass

mypy-play

class Person():
    def __init__(self, name: str, age: int, characteristics: type):
      self.name = name
      self.age = age
      self.characteristics = characteristics

def foo(person: Person) -> None:
    reveal_type(person.characteristics) # N: Revealed type is "builtins.type"
    class Sub(person.characteristics): pass

mypy-play

from typing import Any

class Person():
    def __init__(self, name: str, age: int, characteristics: type):
      self.name = name
      self.age = age
      self.characteristics = characteristics

def foo(person: Person) -> None:
    reveal_type(person.characteristics) # N: Revealed type is "builtins.type"

mypy-play

mypy somme.py

mypy-play

from typing import Iterator


def fib(n: int) -> Iterator[int]:
    a, b = 0, 1
    while a < n:
        yield a
        a, b = b, a + b

mypy-play

from typing import overload, Optional

class A:
    pass

class B:
    pass

class C:
    pass