code: def initialize_from_scratch(self):
      logger.info("Initializing Seq2SeqModelCaffe2 from scratch: Start")
      self._build_model(init_params=True)
      self._init_model()
      logger.info(
          "Initializing Seq2SeqModelCaffe2 from scratch: Finish"
      )
  
imports: import argparse
  import collections
  import logging
  import math
  import numpy
  import random
  import time
  import sys
  import os
  import caffe2.proto.caffe2_pb2
  from caffe2.python import core, workspace, data_parallel_model
  import caffe2.python.models.seq2seq.seq2seq_util
  from caffe2.python.models.seq2seq.seq2seq_model_helper import Seq2SeqModelHelper
label_desc: Use image node_id 15 for calling the Seq2SeqModelCaffe2 obj's underlying member method code with example usage: obj.initialize_from_scratch() without return types