<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def sensorupdate(self, data):
 """ Given a dict of sensors and values, updates those sensors with the values in Scratch. """

        if not isinstance(data, dict):
            raise TypeError('Expected a dict')
        msg = 'sensor-update '
        for key in data.keys():
            msg += '"%s" "%s" ' % (self._escape(str(key)), 
                                    self._escape(str(data[key])))
        self._send(msg)