def remove_challenge_for_url(url):
 if (not url):
  raise ValueError('URL cannot be empty')
 url = parse.urlparse(url)
 del _cache[url.netloc]

def remove_challenge_for_url ( url ) : if ( not url ) : raise ValueError ( 'URL cannot be empty' ) url = parse . urlparse ( url ) del _cache [ url . netloc ]
removes the cached challenge for the specified url .