Confy, dictionary backed by a json file, use it for your configuration files.

confy.py

"""Confy, a dictionary backed by a json file, serves as a replacement to ini/config files. Use like any other dict, call .save() to save. 

Initialize it with a filename, the backing file will be created if it didn't previously exist,
otherwise, the contents of the file will be loaded into the dict.

save using confy.save(), loading happens automatically
"""

import json
import collections
import os.path

class Confy(collections.MutableMapping):

    def __init__(self, filename, *args, **kwargs):
        self.store = dict()
        self.filename = filename
        self.update(dict(*args, **kwargs))  # use the free update to set keys

        if os.path.isfile(self.filename):
            # if storage exists, load it into this dict
            with open(self.filename) as f:
                self.store = json.load(f)
        else:
            # if storage doesn't exist, create it
            with open(self.filename, 'w') as f:
                f.write("{}") # write an empty dictionary to the file

    def __getitem__(self, key):
        return self.store[self.__keytransform__(key)]

    def __setitem__(self, key, value):
        self.store[self.__keytransform__(key)] = value

    def __delitem__(self, key):
        del self.store[self.__keytransform__(key)]

    def __iter__(self):
        return iter(self.store)

    def __len__(self):
        return len(self.store)

    def __keytransform__(self, key):
        return key

    def save(self):
        with open(self.filename, 'w') as f:
            json.dump(self.store, f, indent=4)