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What is the main difference between a @classmethod and a regular instance method in Python?

easy🧠 Conceptual Q1 of Q15
Python - Class Methods and Static Methods
What is the main difference between a @classmethod and a regular instance method in Python?
AA class method receives the class as the first argument instead of an instance.
BA class method can only be called on an instance, not on the class itself.
CA class method cannot access class variables.
DA class method is automatically static and cannot modify class state.
Step-by-Step Solution
Solution:

  1. Step 1: Understand method types

    Instance methods receive the instance (self) as the first argument, while class methods receive the class (cls).

  2. Step 2: Compare class method behavior

    Class methods can be called on the class itself and receive the class, allowing access to class variables and methods.

  3. Final Answer:

    A class method receives the class as the first argument instead of an instance. -> Option A

  4. Quick Check:

    Class method first argument = cls [OK]
Quick Trick: Class methods get cls, instance methods get self [OK]
Common Mistakes:
MISTAKES
  • Confusing cls with self
  • Thinking class methods can't access class variables
  • Assuming class methods are static methods

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