Implementing the Factory Method Pattern in Python (Summary)

In this excellent video course I learned how to use the Factory Method Pattern to implement Serializers. My only suggestion is that I would have appreciated some pointers on how the method could be used for Deserializers.

Thank you for your feedback, that’s much appreciated!

I think the beauty of the method is that the Client doesn’t need to worry about that. All the Client has to do is establish an interface with the Creator, for example, pass a dictionary my_dict to the Creator and tell the creator to organise the deserialization of that dictionary into a class, maybe something like deserialize(my_dict, "class").

The Creator will then call the Factory Method which will trigger the appropriate Deserializer Product, the instance of which can be returned to the Client. In my mind I’m just going through the little graphic discussed in the course. So, the setup would be the same, but the products would be different.

Not related to the Factory Method pattern itself, but further to your question, to deserialize a dictionary to a class you can use the __dict__ instance attribute in the __init__ method of your Product class which will make the dictionary keys available as instance attributes of the product class, for example

import json

class Dict_to_Class_Deserializer:
    def __init__(self, my_dict):
        self.__dict__ = json.loads(my_dict)

A video course on the use of __dict__ is being edited at the moment, so should be available shortly. In the meantime, there is a great written tutorial: Using Python’s __dict__

Hope that helps!