How to use the vcsi.vcsi.Config.load_configuration function in vcsi

# Argument parser before actual argument parser to let the user overwrite the config path
    preargparser = argparse.ArgumentParser(add_help=False)
    preargparser.add_argument("-c", "--config", dest="configfile", default=None)
    preargs, _ = preargparser.parse_known_args()
    try:
        if preargs.configfile:
            # check if the given config file exists
            # abort if not, because the user wants to use a specific file and not the default config
            if os.path.exists(preargs.configfile):
                Config.load_configuration(preargs.configfile)
            else:
                error_exit("Could find config file")
        else:
            # check if the config file exists and load it
            if os.path.exists(DEFAULT_CONFIG_FILE):
                Config.load_configuration(DEFAULT_CONFIG_FILE)
    except configparser.MissingSectionHeaderError as e:
        error_exit(e.message)

    parser = argparse.ArgumentParser(description="Create a video contact sheet",
                                     formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument("filenames", nargs="+")
    parser.add_argument(
        "-o", "--output",
        help="save to output file",
        dest="output_path")
    # adding --config to the main parser to display it when the user asks for help
    # the value is not important anymore
    parser.add_argument(
        "-c", "--config",
        help="Config file to load defaults from",
        default=DEFAULT_CONFIG_FILE

def main():
    """Program entry point
    """
    # Argument parser before actual argument parser to let the user overwrite the config path
    preargparser = argparse.ArgumentParser(add_help=False)
    preargparser.add_argument("-c", "--config", dest="configfile", default=None)
    preargs, _ = preargparser.parse_known_args()
    try:
        if preargs.configfile:
            # check if the given config file exists
            # abort if not, because the user wants to use a specific file and not the default config
            if os.path.exists(preargs.configfile):
                Config.load_configuration(preargs.configfile)
            else:
                error_exit("Could find config file")
        else:
            # check if the config file exists and load it
            if os.path.exists(DEFAULT_CONFIG_FILE):
                Config.load_configuration(DEFAULT_CONFIG_FILE)
    except configparser.MissingSectionHeaderError as e:
        error_exit(e.message)

    parser = argparse.ArgumentParser(description="Create a video contact sheet",
                                     formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument("filenames", nargs="+")
    parser.add_argument(
        "-o", "--output",
        help="save to output file",
        dest="output_path")