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❔ Question 54: #python
What is the purpose of the 'classmethod' decorator in Python?Anonymous voting
- to define a method that can only be accessed by the class itself, not its instances.
- to define a method that automatically receives the instance as its first argument.
- to define a method that operates on the class itself rather than on instances.
- to define a method that is automatically inherited by subclasses.
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❤️The staticmethod function in Python is used to define a method that operates on the class itself rather than on its instances.
❤️This type of method does not receive the instance as its first argument, unlike instance methods.
❤️These methods are typically used for utility functions related to the class that do not require access to instance attributes.
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1⃣ A class MathOperations is defined with two methods, add and multiply, both defined using the @staticmethod decorator.
2⃣ These methods do not need to access any instance attributes or methods, so they can be defined as static methods.
3⃣ Static methods are called directly on the class without the need to create an instance of the class.
✅ Using staticmethod is useful when you need a function within a class that does not need to access any data from instances of that class and can operate independently.
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class MathOperations: @staticmethod def add(a, b): return a + b @staticmethod def multiply(a, b): return a * b # Calling static methods without needing to create an instance of the class result_add = MathOperations.add(5, 3) result_multiply = MathOperations.multiply(4, 7) print(f"Addition: {result_add}") # Output: Addition: 8 print(f"Multiplication: {result_multiply}") # Output: Multiplication: 28
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❔ Question 53: #python
What is the purpose of the 'staticmethod' decorator in Python?Anonymous voting
- It is used to define a method that can only be accessed by the class itself, not its instances.
- It is used to define a method that automatically receives the instance as its first argument.
- It is used to define a method that operates on the class itself rather than on instances.
- It is used to define a method that is automatically inherited by subclasses.
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❤️The super function in Python is used to call a method from the parent class inside a subclass.
❤️ This function gives access to the methods and properties of the parent class and allows you to use and extend the methods of the parent class in subclasses.
❤️It is very common in object-oriented programming to extend the capabilities of parent classes in subclasses.
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class Animal: def init(self, name): self.name = name def speak(self): return "Some sound" class Dog(Animal): def init(self, name, breed): super().init(name) self.breed = breed def speak(self): return f"{self.name} says Woof!" class Cat(Animal): def init(self, name, color): super().init(name) self.color = color def speak(self): return f"{self.name} says Meow!" # Create objects from Dog and Cat classes dog = Dog('Buddy', 'Golden Retriever') cat = Cat('Whiskers', 'Gray') # Calling speak methods print(dog.speak()) # خروجی: Buddy says Woof! print(cat.speak()) # خروجی: Whiskers says Meow!
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