Python OOP
Classes, inheritance, polymorphism, magic methods, dataclasses, property decorators
1What is a class in Python?
What is a class in Python?
回答
A class is a blueprint for creating objects. It defines attributes (data) and methods (behaviors) that objects created from this class will have. In Python, a class is defined with the class keyword and allows encapsulating data and functionality together, promoting code reuse and organization.
2What is the role of the __init__ method in a Python class?
What is the role of the __init__ method in a Python class?
回答
The __init__ method is the constructor of a Python class. It is automatically called when creating a new instance. Its main role is to initialize the instance attributes with the values passed as parameters. The first parameter is always self, which refers to the instance being created.
3What is the difference between a class attribute and an instance attribute?
What is the difference between a class attribute and an instance attribute?
回答
A class attribute is defined at the class level and shared by all instances. Modifying this attribute affects all existing instances. An instance attribute is defined in __init__ with self and is unique to each instance. Each object has its own copy of the instance attribute.
What is the purpose of the self parameter in Python class methods?
How to implement simple inheritance in Python?
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