Lesson 7.2: Classes and Objects
Introduction:
Classes and objects are the foundation of OOP in Python. A class acts as a blueprint for creating objects, while objects are individual instances of that class. This lesson teaches how to define classes, create objects, and interact with their attributes and methods.
1. Defining a Class:
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Use the
classkeyword to define a class. -
Classes contain attributes (variables) and methods (functions).
Example:
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__init__is the constructor method that initializes object attributes when created.
2. Creating Objects:
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Instantiate a class to create objects.
Example:
3. Accessing Attributes:
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Object attributes can be accessed or modified using the dot
.operator.
Example:
4. Practical Tips:
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Use meaningful class and attribute names for readability
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Keep the
__init__constructor simple and only initialize essential attributes -
Use methods to define behaviors that operate on object data
Learning Outcome of This Lesson:
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Define classes and constructors in Python
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Create multiple objects from a class
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Access and modify object attributes
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Call methods associated with objects to perform actions
