Join Jungwoo Ryoo for an in-depth discussion in this video Strategy, part of Python: Design Patterns.
- The Strategy pattern offers a family of interchangeable algorithms to a client. The problem we often see is that there is a need for dynamically changing the behavior of an object. So we offer our Strategy class with its default behavior. When there is a need, we provide another variation of the Strategy class by dynamically replacing its default method with a new one.
Python allows adding methods dynamically by importing the types module.
- Understanding design patterns
- Best design practices: consistency, completeness, and correctness
- Working with creational patterns
- Working with structural patterns
- Working with behavioral patterns
Skill Level Intermediate
Q: In the strategy pattern example, why does the code keep executing the default function rather than the alternate?
A: The programming demonstration skips the step of defining what the strategy pattern should be when an alternate function name is provided
as an argument as shown below.
Programming Foundations: Design Patternswith Elisabeth Robson2h 19m Intermediate
1. Understanding Design Patterns
2. Creational Patterns
3. Structural Patterns
4. Behavioral Patterns
5. Design Best Practices
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