I want to have simple data structure, and save it to disk as json, and later take the json and put back into the data structure.

This is the error I get:

AttributeError: ‘dict’ object has no attribute ‘saveToFile’

with the code below:

import json
from typing_extensions import TypedDict

    class AutoBlog(TypedDict):
        blog_title: str
        blog_prompt: str
        min_words: int
        max_words: int
        def saveToFile(self, filename):
            str_json = json.dumps(self)
            with open(filename, 'w', encoding='unicode-escape') as f:
                f.write(str_json)
        def readFromFile(self, filename):
            with open(filename) as f:
                str_json = f.read()
            self = json.loads(str_json)
    
    
    if __name__ == "__main__":
        filename = 'c:/Users/All Users/WebsiteGarden/test_serialize.json'
        print("Filename=" + filename)
    
        autoBlogData1 = AutoBlog()
        autoBlogData1['blog_title'] = "my blog title"
        autoBlogData1['blog_prompt'] = "write an article about xyz"
        autoBlogData1['min_words'] = 800
        autoBlogData1['max_words'] = 1200
    
        autoBlogData1.saveToFile(filename)
    
        autoBlogData2 = AutoBlog()
        autoBlogData2.readFromFile(filename)
        print("autoBlogData2['blog_title']=" + autoBlogData2['blog_title'])