aggregation in oop python

aggregation is a fundamental concept in object-oriented programming (oop) that allows you to create relationships between classes where one class contains references to other classes as part of its state. it is a form of association that represents a "has-a" relationship between objects.
in this tutorial, we'll explore the concept of aggregation in python, its implementation, and provide code examples to illustrate its usage.
aggregation involves creating a relationship between two classes, where one class (the container or aggregator) contains references to other classes (the components or aggregated objects). these aggregated objects can exist independently of the aggregator, and they can be shared among multiple aggregators.
aggregation is often depicted as a diamond-shaped line with a solid line connecting the aggregator to the aggregated class.

in the context of python, aggregation is implemented using instance variables that hold references to other objects.
let's consider a practical example of aggregation involving classes representing a department and employee.
in this example:
aggregation is a powerful concept in oop that allows you to model relationships between classes in a flexible and modular way. by understanding and implementing aggregation in python, you can create more complex and structured object-oriented designs for your applications.
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