Join Jungwoo Ryoo for an in-depth discussion in this video Template method, part of Python: Advanced Design Patterns.
- [Instructor] By definition,…in object oriented programming,…inheritance allows a child class…to override a method defined by it's parent class.…This capability is referred to as polymorphism.…For example, the parent class shape here has a draw method…which can be overwritten by it's child classes…such as triangle, rectangle, and circle.…When I execute the draw method…on the triangle class it will draw a triangle…while the draw method on circle will draw a circle.…
The template method design pattern is behavioral…in nature and provides a stricter version of polymorphism.…It allows or forces only a select group of methods…to be overridden and prevents the rest…of methods belonging to a parent class…from being changed by it's child classes.…By restricting how much it's child class behaviors…can deviate from it's parent class,…the template method pattern defines a skeleton…of operations that will always be present in child classes.…
It is a solution that allows developers…to extract commonalities across similar classes…
- Architectural vs. design patterns
- Why use design patterns?
- Design best practices
- Domain-specific patterns and security patterns
- Gang of Four design patterns
- Command, Mediator, and State
- Template method
Skill Level Advanced
Learning Python and Django (2015)with Caleb Smith1h 11m Intermediate
Programming Foundations: Design Patternswith Elisabeth Robson2h 19m Intermediate
1. Understanding Design Patterns: Review
2. Design Best Practices
3. Gang of Four (GoF) Patterns, Part 1
4. Gang of Four (GoF) Patterns, Part 2
Next steps1m 26s
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