code: def i2c_read_data(self, address):
          
          task = asyncio.ensure_future(self.core.i2c_read_data(address))
          value = self.loop.run_until_complete(task)
          return value
docs: Retrieve result of last data read from i2c device.
          i2c_read_request should be called before trying to retrieve data.
          It is intended for use by a polling application.
  
          :param address: i2c
  
          :returns: last data read or None if no data is present.