code: def proto_fingerprint(message_proto):
      serialized_message = message_proto.SerializeToString()
      hasher = hashlib.sha256(serialized_message)
      return hasher.hexdigest()
  
imports: import collections
  import hashlib
  import os
  from tensorflow.python.platform import gfile
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.tpu import tensor_tracer_pb2
label_desc: Use image node_id 3 for calling a global function with example usage: proto_fingerprint(message_proto) and returns: hasher