def write(self, data, ctx):
    if len(data) != 2:
      logging.error("Got bad tuple of length %d (2-tuple expected): %s",
                    len(data), data)

    try:
      key = str(data[0])
      value = str(data[1])
    except __HOLE__:
      logging.error("Expecting a tuple, but got %s: %s",
                    data.__class__.__name__, data)

    proto = file_service_pb.KeyValue()
    proto.set_key(key)
    proto.set_value(value)
    FileRecordsOutputWriter.write(self, proto.Encode(), ctx)
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/output_writers.py/KeyValueFileOutputWriter.write