def unwrap(url):
    url = url.strip()
    if url[:1] == '<' and url[-1:] == '>':
        url = url[1:-1].strip()
    if url[:4] == 'URL:': url = url[4:].strip()
    return url
unwrap('<URL:type://host/path>') --> 'type://host/path'.
dataset/ETHPy150Open ofermend/medicare-demo/socialite/jython/Lib/urllib.py/unwrap