code: def init_train():
      init_model()
      init_train_op()
      init_eval_op()
      init_summaries()
      init_collections()
      init_session()
  
imports: import argparse
  import json
  import tensorflow
  from tensorflow.examples.tutorials.mnist import input_data
label_desc: Use image node_id 2 for calling a global function with example usage: init_train() without return types