Advanced Python for Data Engineering
OOP, decorators, generators, context managers, typing, async/await, modules, virtual environments
1What is a class in Python?
What is a class in Python?
Answer
A class is a blueprint that defines the structure and behavior of objects. It encapsulates data (attributes) and functions (methods) that operate on that data. Classes allow creating multiple instances sharing the same structure but with different values, which is fundamental to object-oriented programming.
2What is the role of the __init__ method in a Python class?
What is the role of the __init__ method in a Python class?
Answer
The __init__ method is the constructor of a Python class. It is automatically called when creating a new instance and allows initializing the object's attributes with specific values. This method always receives self as its first parameter, which references the instance being created.
3What is the difference between an instance method and a class method in Python?
What is the difference between an instance method and a class method in Python?
Answer
An instance method receives self and operates on a specific instance, while a class method (decorated with @classmethod) receives cls and operates on the class itself. Class methods are useful for creating factory methods or modifying class attributes shared by all instances.
What is a decorator in Python?
How to create a decorator that accepts arguments?
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