def _check_vars():
    '\n    Check validity of environment variables.\n\n    Look out for any environment variables that start with "MODIN_" prefix\n    that are unknown - they might be a typo, so warn a user.\n    '
    valid_names = {obj.varname for obj in globals().values() if (isinstance(obj, type) and issubclass(obj, EnvironmentVariable) and (not obj.is_abstract))}
    found_names = {name for name in os.environ if name.startswith('MODIN_')}
    unknown = (found_names - valid_names)
    if unknown:
        warnings.warn((f"Found unknown environment variable{('s' if (len(unknown) > 1) else '')}, please check {('their' if (len(unknown) > 1) else 'its')} spelling: " + ', '.join(sorted(unknown))))
Check validity of environment variables.

Look out for any environment variables that start with "MODIN_" prefix
that are unknown - they might be a typo, so warn a user.
def _check_vars():
    '\n    Check validity of environment variables.\n\n    Look out for any environment variables that start with "MODIN_" prefix\n    that are unknown - they might be a typo, so warn a user.\n    '
    valid_names = {obj.varname for obj in globals().values() if (isinstance(obj, type) and issubclass(obj, EnvironmentVariable) and (not obj.is_abstract))}
    found_names = {name for name in os.environ if name.startswith('MODIN_')}
    unknown = (found_names - valid_names)
    if unknown:
        warnings.warn((f"Found unknown environment variable{('s' if (len(unknown) > 1) else )}, please check {('their' if (len(unknown) > 1) else 'its')} spelling: " + ', '.join(sorted(unknown))))