Python Level 7: Classes, Objects & self Binding

Why This Matters: Classes encapsulate state and behavior into reusable software objects.

## Object-Oriented Programming in Python

Classes define blueprints for objects.

```python
class Student:
    def __init__(self, name, score):
        self.name = name
        self.score = score
    
    def is_passing(self):
        return self.score >= 60

s = Student("Maya", 88)
print(f"{s.name} Passing: {s.is_passing()}")
```

MENTAL MODEL & MEMORY LAYOUT

INSTANTIATION MODEL:
Student("Maya", 88) ──► Allocates instance ──► Binds self.name="Maya", self.score=88

COMMON PITFALLS TO AVOID

Forgetting `self` parameter in instance method declarations.

Class Inheritance Pattern

class Animal:
    def speak(self):
        return "Generic Sound"

class Dog(Animal):
    def speak(self):
        return "Woof!"

d = Dog()
print(d.speak()) # Outputs Woof!

Subclass overrides parent method implementation.

CONCEPT MASTERY CHECKPOINT

In Python class methods, what does the `self` parameter represent?

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Python Level 8: Problem Solving & Hash Maps

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Challenge: Create class Circle with radius attribute and area() method.

Python Level 7: Classes, Objects & self Binding

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