def METHOD_NAME(path, start):
    path = normsep(path)
    start = normsep(start)
    if sys.platform == "win32":
        # os.path.relpath can't handle relative paths between UNC and non-UNC
        # paths, so strip a //?/ prefix if present (bug 1581248)
        path = cargo_workaround(path)
        start = cargo_workaround(start)
    try:
        rel = os.path.METHOD_NAME(path, start)
    except ValueError:
        # On Windows this can throw a ValueError if the two paths are on
        # different drives. In that case, just return the path.
        return abspath(path)
    rel = normsep(rel)
    return "" if rel == "." else rel