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Use helper class ABC instead of metaclass ABCMeta
1 parent 43676e7 commit a985feb

13 files changed

Lines changed: 32 additions & 32 deletions

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‎src/AbstractFactory/Structural/main.py‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -12,10 +12,10 @@
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from __future__ import annotations
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from abc import ABCMeta, abstractmethod
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from abc import ABC, abstractmethod
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class AbstractFactory(metaclass=ABCMeta):
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class AbstractFactory(ABC):
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"""
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EN: The Abstract Factory interface declares a set of methods that return
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different abstract products. These products are called a family and are
@@ -84,7 +84,7 @@ def create_product_b(self) -> ConcreteProductB2:
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"""
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class AbstractProductA(metaclass=ABCMeta):
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class AbstractProductA(ABC):
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@abstractmethod
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def useful_function_a(self) -> str:
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pass
@@ -107,7 +107,7 @@ def useful_function_a(self) -> str:
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return "The result of the product A2."
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class AbstractProductB(metaclass=ABCMeta):
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class AbstractProductB(ABC):
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"""
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EN: Here's the the base interface of another product. All products can interact with
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each other, but proper interaction is possible only between products of the

‎src/Builder/Structural/main.py‎

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@@ -13,11 +13,11 @@
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from __future__ import annotations
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from abc import ABCMeta, abstractmethod, abstractproperty
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from abc import ABC, abstractmethod, abstractproperty
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from typing import Any
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class Builder(metaclass=ABCMeta):
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class Builder(ABC):
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"""
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EN: The Builder interface specifies methods for creating the different parts
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of the Product objects.

‎src/ChainOfResponsibility/Structural/main.py‎

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@@ -14,11 +14,11 @@
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"""
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from __future__ import annotations
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from abc import ABCMeta, abstractmethod
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from abc import ABC, abstractmethod
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from typing import Any, Optional
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class Handler(metaclass=ABCMeta):
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class Handler(ABC):
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"""
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EN: The Handler interface declares a method for building the chain of
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handlers. It also declares a method for executing a request.

‎src/Command/Structural/main.py‎

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Original file line numberDiff line numberDiff line change
@@ -14,10 +14,10 @@
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from __future__ import annotations
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from abc import ABCMeta, abstractmethod
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from abc import ABC, abstractmethod
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class Command(metaclass=ABCMeta):
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class Command(ABC):
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"""
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EN: The Command interface declares a method for executing a command.
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‎src/FactoryMethod/Structural/main.py‎

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Original file line numberDiff line numberDiff line change
@@ -14,10 +14,10 @@
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from __future__ import annotations
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from abc import ABCMeta, abstractmethod
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from abc import ABC, abstractmethod
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class Creator(metaclass=ABCMeta):
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class Creator(ABC):
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"""
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EN: The Creator class declares the factory method that is supposed to return
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an object of a Product class. The Creator's subclasses usually provide the
@@ -100,7 +100,7 @@ def factory_method(self) -> ConcreteProduct2:
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return ConcreteProduct2()
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class Product(metaclass=ABCMeta):
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class Product(ABC):
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"""
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EN: The Product interface declares the operations that all concrete products
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must implement.

‎src/Mediator/Structural/main.py‎

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Original file line numberDiff line numberDiff line change
@@ -15,10 +15,10 @@
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from __future__ import annotations
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from abc import ABCMeta
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from abc import ABC
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class Mediator(metaclass=ABCMeta):
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class Mediator(ABC):
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"""
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EN: The Mediator interface declares a method used by components to notify the
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mediator about various events. The Mediator may react to these events and

‎src/Memento/Structural/main.py‎

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@@ -13,7 +13,7 @@
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from __future__ import annotations
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from abc import ABCMeta, abstractmethod
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from abc import ABC, abstractmethod
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from datetime import datetime
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from random import sample
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from string import ascii_letters, digits
@@ -81,7 +81,7 @@ def restore(self, memento: Memento) -> None:
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print(f"Originator: My state has changed to: {self._state}")
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class Memento(metaclass=ABCMeta):
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class Memento(ABC):
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"""
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EN: The Memento interface provides a way to retrieve the memento's metadata,
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such as creation date or name. However, it doesn't expose the Originator's

‎src/Observer/Structural/main.py‎

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@@ -25,12 +25,12 @@
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from __future__ import annotations
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from abc import ABCMeta, abstractmethod
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from abc import ABC, abstractmethod
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from random import randrange
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from typing import List
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class Subject(metaclass=ABCMeta):
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class Subject(ABC):
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"""
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EN: The Subject owns some important state and notifies observers when the
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state changes.
@@ -52,7 +52,7 @@ def notify(self) -> None:
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pass
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class Observer(metaclass=ABCMeta):
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class Observer(ABC):
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@abstractmethod
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def update(self, subject: Subject) -> None:
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pass

‎src/Proxy/Structural/main.py‎

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@@ -12,10 +12,10 @@
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"""
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from abc import ABCMeta, abstractmethod
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from abc import ABC, abstractmethod
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class Subject(metaclass=ABCMeta):
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class Subject(ABC):
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"""
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EN: The Subject interface declares common operations for both RealSubject and
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the Proxy. As long as the client works with RealSubject using this interface,

‎src/State/Structural/main.py‎

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@@ -12,10 +12,10 @@
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from __future__ import annotations
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from abc import ABCMeta, abstractmethod
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from abc import ABC, abstractmethod
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class Context(metaclass=ABCMeta):
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class Context(ABC):
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"""
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EN: The Context defines the interface of interest to clients. It also
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maintains a reference to an instance of a State subclass, which represents
@@ -62,7 +62,7 @@ def request2(self):
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self._state.handle2()
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class State(metaclass=ABCMeta):
65+
class State(ABC):
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"""
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EN: The base State class declares methods that all Concrete State should
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implement and also provides a backreference to the Context object, associated

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