Set data source to Google Finance

def set_source_google_finance(self):
        """
        Set data source to Google Finance
        """
        self.data_worker = data_worker
        self.worker_args = {"function": pandas.io.data.DataReader, "input": self.input_queue, "output": self.output_map,
                            "source": 'google'}
        self.source_name = "Google Finance"