code: def create_model(self):
      self.input_dim = 1000
      self.embed_dim = 30
      i = C.input_variable((self.input_dim,), is_sparse=True)
      self.p = C.parameter(
          shape=(self.input_dim, self.embed_dim), init=1
      )
      o = C.times(i, self.p)
      self.z = C.reduce_sum(o)
  
imports: import argparse
  import collections
  import os
  import pickle
  import pytest
  import re
  import signal
  import subprocess
  import sys
  import time
  import numpy
  import cntk
label_desc: Use image node_id 2 for calling the SimpleTrainer obj's underlying member method code with example usage: obj.create_model() without return types