[FIXED] Python Loading JSON config file on __init__

Issue

I am new to Python and I am trying to create a class that handles loading my config values. So far this is what I have :

import os, json

class ConfigHandler:
    CONFIG_FILE = "/config.json"

    def __init__(self):
        print("init config")
        if os.path.exists(self.CONFIG_FILE):
            print("Loading config file")
            self.__dict__ = json.load(open(self.CONFIG_FILE))
        else:
            print("Config file not loaded")

Then in my main application class, I am doing :

from ConfigHandler import ConfigHandler
class MainApp:
     config =  ???

I have tried several ways to get the ConfigHandler to initialize, but it never hits the print statements. And I am not sure how to call the confighandler to get the dictionary. Any help is appreciated!

Solution

Given config.json in the root of your drive if using CONFIG_FILE = "/config.json":

{
  "a": 1,
  "b": 2,
  "c": "Mark"
}

Then:

from ConfigHandler import ConfigHandler

config = ConfigHandler()  # Create an instance...calls __init__ implictly
print(config.a, config.b, config.c)

Will output:

1 2 Mark

Answered By - Mark Tolonen