code: def __init__(self) -> None:
      super().__init__()
      self.sigmoid = tf.nn.sigmoid
      self.build((1,))
  
      self.summary()
  
imports: import multiprocessing
  import threading
  from multiprocessing import Process
  import unittest
  import numpy
  import pandas
  import os
  import logging
  from bigdl.ppml.fl.nn.fl_context import init_fl_context
  from bigdl.ppml.fl.nn.tensorflow.utils import set_one_like_parameter
  from bigdl.ppml.fl.nn.fl_server import FLServer
  from bigdl.ppml.fl.estimator import Estimator
  from bigdl.ppml.fl.utils import FLTest
  from typing import List
  import tensorflow
  from tensorflow import Tensor
  from tensorflow.keras.layers import Dense
  from tensorflow.keras import Model, Input
label_desc: Use image node_id 1 to create a new LogisticRegressionNetwork2 object from inherited base classes: Model with example: obj = LogisticRegressionNetwork2()