A small example of how you can save and load data.

settings.py

"""
A small example of how you can save and load data.

If the value does not exist, default values ​​are used. It also allows additional
data. The data is stored in a fixed location. If you want to use this in your
project, you have to customize that.

Author: AxJu
"""
import os
import json

DEFAULTS = {
    'name': 'AxJu',
    'foo': 'spam',
}

def load():
    """
    This function returns the data from your configuration file. If this file
    is not available, it use the default values. The default values ​​will also
    be loaded if some values ​​are missing.
    """
    # Get the home directory and create your config filename.
    # You should customize the filename for your project.
    home = os.path.expanduser('~')
    filename = os.path.join(home, 'yoursettings.json')

    # Load all default values.
    result = dict(DEFAULTS)

    # If the file exists, load the data with json.
    if os.path.exists(filename):
        with open(filename) as file:
            data = json.load(file)

        # Update the result with the loaded data (only if the file exists)
        result.update(data)

    return result

def save(data):
    """
    This function will save the data. If there are some values missing, the
    default will take place.
    """
    # Again, create the filename to your settings file. Make sure this is the
    # same as the load function uses.
    home = os.path.expanduser('~')
    filename = os.path.join(home, 'yoursettings.json')

    # The home folder should always be exists. But we want to be sure. So check
    # and create if not available.
    if not os.path.isdir(home):
        os.makedirs(home)

    # First load the default values into a dummy.
    dummy = dict(DEFAULTS)

    # Update the default values the your data.
    dummy.update(data)

    # Now save the dummy with json.
    with open(filename, 'w') as file:
        json.dump(dummy, file)


if __name__ == '__main__':
    # Some small examples

    # Load the default values
    data = load()
    print(data)
    # {'name': 'AxJu', 'foo': 'spam'}

    # Change the values ​​and add some extras
    data['foo'] = 'Hello'
    data['age'] = 30

    # Save the edited data
    save(data)

    # Load and show the new data
    data = load()
    print(data)
    # {'name': 'AxJu', 'foo': 'Hello', 'age': 30}

DEFUALTS DEFAULTS