@classmethod
def suitable(cls, url):
    'Receives a URL and returns True if suitable for this IE.'
    if ('_VALID_URL_RE' not in cls.__dict__):
        cls._VALID_URL_RE = re.compile(cls._VALID_URL)
    return (cls._VALID_URL_RE.match(url) is not None)
Receives a URL and returns True if suitable for this IE.
@classmethod
def suitable(cls, url):
    
    if ('_VALID_URL_RE' not in cls.__dict__):
        cls._VALID_URL_RE = re.compile(cls._VALID_URL)
    return (cls._VALID_URL_RE.match(url) is not None)