Learning Python Design Patterns - Second Edition

The Simple Factory pattern

For some, Simple Factory is not a pattern in itself. It is more of a concept that developers need to know before they know more about the Factory method and Abstract Factory method. The Factory helps create objects of different types rather than direct object instantiation.

Let's understand this with the help of the following diagram. Here, the client class uses the Factory class, which has the create_type() method. When the client calls the create_type() method with the type parameters, based on the parameters passed, the Factory returns Product1 or Product2:

A UML Diagram of Simple Factory

Let's now understand the Simple ...