import re

non_parsable_parentheses = re.compile(r'(\s*)<\?(.+)\?>\s*\n')
start_nested_find = re.compile(r'(\s*)<(\w+)>\s*\n')
value_find = re.compile(r'(\s*)<(\w+)>(.*)</\w+>\s*\n')
close_nested_find = re.compile(r'(\s*)</\w+>\s*\n')
redundant_commas_find = re.compile(r',(\n\s*})')


def xml_to_json(xml: str) -> str:
    json = xml
    json = re.sub(non_parsable_parentheses, '', json)
    json = re.sub(start_nested_find, r'\1\t"\2": {\n', json)
    json = re.sub(value_find, r'\1\t"\2": "\3",\n', json)
    json = re.sub(close_nested_find, r'\1\t},\n', json)
    json = '{\n' + json + '}'
    json = re.sub(redundant_commas_find, r'\1', json)
    return json


if __name__ == "__main__":
    file = open('schedule.xml', encoding='utf8')
    contents = file.read()
    result = xml_to_json(contents)
    file = open('schedule.json', 'w', encoding='utf8')
    file.writelines(result)
    print(result)