Look at tensorflow nodes

1.py

import tensorflow as tf
import sys
from tensorflow.python.platform import gfile

from tensorflow.core.protobuf import saved_model_pb2
from tensorflow.python.util import compat

with tf.Session() as sess:
    model_filename = 'ssdlite_mobilenet_v2_coco_2018_05_09/saved_model/saved_model.pb'
    with gfile.FastGFile(model_filename, 'rb') as f:
        data = compat.as_bytes(f.read())
        sm = saved_model_pb2.SavedModel()
        sm.ParseFromString(data)
        if 1 != len(sm.meta_graphs):
            print('More than one graph found.')
            sys.exit(1)
        
        #g_in = tf.import_graph_def(sm.meta_graphs[0].graph_def)
        [print(n.name) for n in sm.meta_graphs[0].graph_def.node]