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Where are instance attributes usually defined in a Python class?

easy🧠 Conceptual Q2 of Q15
Python - Classes and Object Lifecycle
Where are instance attributes usually defined in a Python class?
ADirectly in the class body without self
BOutside the class definition
CInside a static method
DInside the __init__ method using self
Step-by-Step Solution
Solution:

  1. Step 1: Identify where instance attributes are set

    Instance attributes are typically set inside the __init__ method, which runs when an object is created.

  2. Step 2: Understand the use of self

    Using self.attribute_name assigns the attribute to the specific object instance.

  3. Final Answer:

    Inside the __init__ method using self -> Option D

  4. Quick Check:

    Instance attributes set in __init__ with self [OK]
Quick Trick: Use self.attribute inside __init__ to create instance attributes [OK]
Common Mistakes:
MISTAKES
  • Defining attributes outside __init__ without self
  • Confusing static methods with instance methods

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