chapter 8

Author: rebuild-123

README.md

@@ -1,14 +1,14 @@
 # Python Head First Design Patterns 
 ## Chapters 
-[chapter 1](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/strategy)-done 
-[chapter 2](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/observer)-done (Only swing has no translation.) 
-[chapter 3](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/decorator)-done (Only io has no translation.) 
-[chapter 4](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/factory)-done 
-[chapter 5](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/singleton)-done 
-[chapter 6](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/command)-done (Only swing has no translation.) 
+[chapter 1(strategy)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/strategy)-done 
+[chapter 2(observer)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/observer)-done (Only swing has no translation.) 
+[chapter 3(decorator)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/decorator)-done (Only io has no translation.) 
+[chapter 4(factory)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/factory)-done 
+[chapter 5(singleton)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/singleton)-done 
+[chapter 6(command)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/command)-done (Only swing has no translation.) 
 [chapter 7(adapter)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/adapter)-done 
 [chapter 7(facade)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/facade/hometheater)-done 
- 
+[chapter 8(templatemethod)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/templatemethod)-done (applet and frame have no translation.) 
 ## Introduction 
 1. Translated from [Head-First-Design-Patterns](https://github.com/bethrobson/Head-First-Design-Patterns) (java) 
 2. What are the differences between other Python version Head-First-Design-Patterns and ours? 

templatemethod/applet/I do not know how to translate.txt

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+from Coffee import Coffee
+from CoffeeWithHook import CoffeeWithHook
+from Tea import Tea
+from TeaWithHook import TeaWithHook
+
+
+class BeverageTestDrive:
+ @staticmethod
+ def main(*args):
+ tea: Tea = Tea()
+ coffee: Coffee = Coffee()
+ 
+ print("\nMaking tea...")
+ tea.prepareRecipe()
+ 
+ print("\nMaking coffee...")
+ coffee.prepareRecipe()
+ 
+ teaHook: TeaWithHook = TeaWithHook()
+ coffeeHook: CoffeeWithHook = CoffeeWithHook()
+ 
+ print("\nMaking tea...")
+ teaHook.prepareRecipe()
+ 
+ print("\nMaking coffee...")
+ coffeeHook.prepareRecipe()
+ 
+if __name__ == "__main__":
+ BeverageTestDrive.main()

templatemethod/barista/BeverageTestDrive.py

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+from abc import ABC, abstractmethod
+
+
+class CaffeineBeverage(ABC):
+ 
+ def prepareRecipe(self) -> None:
+ self.boilWater()
+ self.brew()
+ self.pourInCup()
+ self.addCondiments()
+ 
+ @abstractmethod
+ def brew(self) -> None:
+ pass
+ 
+ @abstractmethod
+ def addCondiments(self) -> None:
+ pass
+ 
+ def boilWater(self) -> None:
+ print("Boiling water")
+ 
+ def pourInCup(self) -> None:
+ print("Pouring into cup")

templatemethod/barista/CaffeineBeverage.py

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+from abc import ABC, abstractmethod
+
+
+class CaffeineBeverageWithHook(ABC):
+ 
+ def prepareRecipe(self) -> None:
+ self.boilWater()
+ self.brew()
+ self.pourInCup()
+ if self.customerWantsCondiments(): 
+ self.addCondiments()
+ 
+ @abstractmethod
+ def brew(self) -> None:
+ pass
+ 
+ @abstractmethod
+ def addCondiments(self) -> None:
+ pass
+ 
+ def boilWater(self) -> None:
+ print("Boiling water")
+ 
+ def pourInCup(self) -> None:
+ print("Pouring into cup")
+ 
+ def customerWantsCondiments(self) -> bool:
+ return True

templatemethod/barista/CaffeineBeverageWithHook.py

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+from CaffeineBeverage import CaffeineBeverage
+
+
+class Coffee(CaffeineBeverage):
+ def brew(self) -> None:
+ print("Dripping Coffee through filter")
+ 
+ def addCondiments(self) -> None:
+ print("Adding Sugar and Milk")

templatemethod/barista/Coffee.py

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+from CaffeineBeverageWithHook import CaffeineBeverageWithHook
+
+
+class CoffeeWithHook(CaffeineBeverageWithHook):
+ 
+ def brew(self) -> None:
+ print("Dripping Coffee through filter")
+ 
+ def addCondiments(self) -> None:
+ print("Adding Sugar and Milk")
+ 
+ def customerWantsCondiments(self) -> bool:
+ answer: str = self.__getUserInput()
+ if answer.lower().startswith('y'):
+ return True
+ else:
+ return False
+ 
+ def __getUserInput(self) -> str:
+ answer = None
+ print("Would you like milk and sugar with your coffee (y/n)? ")
+ try:
+ answer = input()
+ except IOError:
+ print("IO error trying to read your answer")
+ if answer == None:
+ return 'no'
+ return answer

templatemethod/barista/CoffeeWithHook.py

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+from CaffeineBeverage import CaffeineBeverage
+
+
+class Tea(CaffeineBeverage):
+ def brew(self) -> None:
+ print("Steeping the tea")
+ def addCondiments(self) -> None:
+ print("Adding Lemon")

templatemethod/barista/Tea.py

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+from CaffeineBeverageWithHook import CaffeineBeverageWithHook
+
+
+class TeaWithHook(CaffeineBeverageWithHook):
+ 
+ def brew(self) -> None:
+ print("Steeping the tea")
+ 
+ def addCondiments(self) -> None:
+ print("Adding Lemon")
+ 
+ def customerWantsCondiments(self) -> bool:
+ answer: str = self.__getUserInput()
+ 
+ if answer.lower().startswith('y'):
+ return True
+ else:
+ return False
+ 
+ def __getUserInput(self) -> str:
+ answer: str = None
+ print("Would you like lemon with your tea (y/n)? ")
+ try:
+ answer = input()
+ except IOError:
+ print("IO error trying to read your answer")
+ if answer == None:
+ return "no"
+ return answer