code: def dweet_for(thing_name, payload, key=None, session=None):
      
      if key is not None:
          params = {'key': key}
      else:
          params = None
      return _send_dweet(payload, '/dweet/for/{0}'.format(thing_name), params=params, session=session)
docs: Send a dweet to dweet.io for a thing with a known name