def url_must_exist(url: str) -> bool:
    """
    Check that a URL exists, for early validation of pip (etc) arguments.

    Raises an exception if it doesn't exist.
    """
    resp = requests.head(url)
    resp.raise_for_status()
    return True

    Check that a URL exists, for early validation of pip (etc) arguments.

    Raises an exception if it doesn't exist.
    
benchmark/benchmark.py