added cafeteria example

15-more-types/cafeteria/cafeteria.py

@@ -1,41 +0,0 @@
-from typing import TypeVar, Generic
-
-
-class Beverage:
-    """Any beverage"""
-
-
-class Juice(Beverage):
-    """Any fruit juice"""
-
-
-class OrangeJuice(Juice):
-    """Delicious juice Brazilian oranges"""
-
-
-class Coak(Beverage):
-    """Secret formula with lots of sugar"""
-
-
-BeverageT = TypeVar('BeverageT', bound=Beverage)
-JuiceT = TypeVar('JuiceT', bound=Juice)
-
-
-class BeverageDispenser(Generic[BeverageT]):
-
-    beverage: BeverageT
-
-    def __init__(self, beverage: BeverageT) -> None:
-        self.beverage = beverage
-
-    def dispense(self) -> BeverageT:
-        return self.beverage
-
-
-class JuiceDispenser(BeverageDispenser[JuiceT]):
-    pass
-
-
-class Cafeteria:
-    def __init__(self, dispenser: BeverageDispenser[JuiceT]):
-        self.dispenser = dispenser

15-more-types/cafeteria/cafeteria_demo.py

@@ -1,23 +0,0 @@
-from cafeteria import (
-    Cafeteria,
-    BeverageDispenser,
-    JuiceDispenser,
-    Juice,
-    OrangeJuice,
-    Coak,
-)
-
-orange = OrangeJuice()
-
-orange_dispenser: JuiceDispenser[OrangeJuice] = JuiceDispenser(orange)
-
-juice: Juice = orange_dispenser.dispense()
-
-soda = Coak()
-
-## Value of type variable "JuiceT" of "JuiceDispenser" cannot be "Coak"
-# soda_dispenser = JuiceDispenser(soda)
-
-soda_dispenser = BeverageDispenser(soda)
-
-arnold_hall = Cafeteria(soda_dispenser)