Added unit tests and readme for model optimizer (#79)

* added unit tests
* added readme for model optimizer
* added a list of supported IE plugins

model-optimizer/mo/utils/convert.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+"""
+ Copyright (c) 2018 Intel Corporation
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+"""
+import argparse
+import os
+import sys
+
+import tensorflow as tf
+
+sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, os.pardir))
+from mo.front.tf.loader import load_tf_graph_def
+
+os.environ['TF_CPP_MIN_LOG_LEVEL'] = '3'
+
+
+def argparser():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--to_pbtxt", dest='pb', type=str, help="Path to TensorFlow binary model")
+    parser.add_argument('--to_pb', dest='pbtxt', type=str, help="Path to TensorFlow text model")
+    return parser.parse_args()
+
+
+def convert(filename: str, is_text: bool):
+    if not os.path.isfile(filename):
+        raise FileNotFoundError("File doesn't exist: {}".format(filename))
+    new_ext = ".pbtxt" if is_text else ".pb"
+    head, tail = os.path.split(os.path.abspath(filename))
+    print("Convert: {} \n     to: {}".format(filename, os.path.join(head, tail + new_ext)))
+    graph_def, _ = load_tf_graph_def(graph_file_name=filename, is_binary=is_text)
+    tf.import_graph_def(graph_def, name='')
+    tf.train.write_graph(graph_def, head, tail + new_ext, as_text=is_text)
+
+
+if __name__ == '__main__':
+    argv = argparser()
+    if argv.pb is None and argv.pbtxt is None:
+        print("Please provide model to convert --to_pb or --to_pbtxt")
+        sys.exit(1)
+    if argv.pb is not None:
+        convert(argv.pb, True)
+    if argv.pbtxt is not None:
+        convert(argv.pbtxt, False)