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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 async def _on_progress_notification(self, progress):
 """Callback function called when a progress notification is received. Args: progress (dict):
 The received notification containing the progress information """


        conn_string = progress.get('connection_string')
        done = progress.get('done_count')
        total = progress.get('total_count')
        operation = progress.get('operation')

        await self.notify_progress(conn_string, operation, done, total, wait=True)