raspi-zero-waveshare/simpilib/runtime.py

import os as _os
runtime_dir = _os.path.realpath(_os.path.join(__file__,'..','..','runtime'))
config_file = _os.path.join(runtime_dir, "config.json")

def load_config():
    import json
    if _os.path.isfile(config_file):
        with open(config_file) as fd:
            return json.load(fd)
    else:
        return {}

def save_config():
    import json
    with open(config_file, "w") as fd:
        return json.dump(fd)