Join Jungwoo Ryoo for an in-depth discussion in this video Factory example, part of Python: Design Patterns.
- We just defined this Dog class.…The Dog class, whenever it is created,…calling this init method which is a setting,…the name of the dog,…and then it has a method called speak…and it simply returns a string, "Woof!"…Now, let's create a new function called get_pet.…So type def get_pet.…Now, we've passing this key value combination…because whatever argument we're passing will be stored…in a dictionary object.…
We've passing this argument which is going to be used…as a key in the dictionary object.…The name of the variable is pet,…we'll initialize that variable with dog,…just a string, initial string.…So the default value of pet is dog.…Then we'll define this function…by adding some internal documentation first.…Since this is the factory method…we'll be using to create our object,…we'll simply say it,…***The factory method***.…
In the factory function,…the mission is really to create these objects…and to return these objects to the user of the function.…We'll be storing those objects being created…into a variable called pets.…
- 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.
1. Understanding Design Patterns
2. Creational Patterns
3. Structural Patterns
4. Behavioral Patterns
5. Design Best Practices
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