code: def ticker(self, symbol):
          
          data = self._get(self.url_for(PATH_TICKER, (symbol)))
  
          # convert all values to floats
          return self._convert_to_floats(data)
docs: GET /ticker/:symbol
  
          curl https://api.bitfinex.com/v1/ticker/btcusd
          {
              'ask': '562.9999',
              'timestamp': '1395552290.70933607',
              'bid': '562.25',
              'last_price': u'562.25',
              'mid': u'562.62495'}