'A base class for a web service.
- license  : license key for the API,
- throttle : delay between requests (avoid hammering the server).
Inherited by: Google, Bing, Wikipedia, Twitter, Facebook, Flickr, ...'

def __init__(self, license=None, throttle=1.0, language=None):

    self.license = license
    self.throttle = throttle
    self.language = language
    self.format = (lambda x: x)
