A decorator that saves and loads config.

configurer.py

import click
import json
import sys
import os


class Configurer:
    executable = os.path.abspath(sys.argv[0])

    def save(func, *args, **kwargs):
        del kwargs["save"]
        if "load" in kwargs:
            del kwargs["load"]

        try:
            with open(f"{Configurer.executable}.conf", "w") as f:
                json.dump(kwargs, f, indent=2, ensure_ascii=False)
            func(*args, **kwargs)
        except (OSError) as e:
            print("OSError: Failed to save config data: {}".format(str(e)))

    def load(func, *args, **kwargs):
        del kwargs["load"]
        if "save" in kwargs:
            del kwargs["save"]

        try:
            with open(f"{Configurer.executable}.conf", "r") as f:
                config = json.load(f)
                for key, value in config.items():
                    kwargs[key] = value
            func(*args, **kwargs)
        except (OSError) as e:
            print("OSError: Failed to load config data: {}".format(str(e)))

    def main(func):
        def inner(*args, **kwargs):
            if (os.path.isfile(f"{Configurer.executable}.conf")) and \
                    ("load" in kwargs) and kwargs["load"]:
                Configurer.load(func, *args, **kwargs)

            elif "save" in kwargs and kwargs["save"]:
                Configurer.save(func, *args, **kwargs)

            else:
                if "save" in kwargs:
                    del kwargs["save"]
                if "load" in kwargs:
                    del kwargs["load"]

                func(*args, **kwargs)

        return inner