remove_files.py

#!/usr/bin/python3
from ruamel import yaml
import sys
import os
import os.path


def valid(element_name):
    return os.path.exists(f"elements/{element_name}")


def main(filename):
    with open(filename) as file:
        data = yaml.round_trip_load(file)

    for project in list(data["projects"]):
        for element in list(data["projects"][project]):
            if not valid(element):
                del data["projects"][project][element]

    with open(filename, "w") as file:
        yaml.round_trip_dump(data, file)

if __name__ == "__main__":
    main(sys.argv[1])