我正在尝试从tensorflow / models中提供的export_inference_graph.py脚本将trained_checkpoint转换为最终冻结的模型，但是会出现以下错误。是的，我已经将$ PYTHONPATH设置为“ models / slim”，但是仍然出现此错误，有人可以帮我吗？

$ echo $PYTHONPATH
:/home/ishara/tensorflow_models/models:/home/ishara/tensorflow_models/models/slim

*****************************问题******************** ****************************************************** ******

$sudo python3 object_detection/export_inference_graph.py  --input_type image_tensor  --pipeline_config_path = "ssd_inception_v2_pets.config"  --trained_checkpoint_prefix="output/model.ckpt-78543"  --output_directory="birds_inference_graph.pb"

Traceback (most recent call last):
  File "object_detection/export_inference_graph.py", line 74, in <module>
    from object_detection import exporter
  File "/usr/local/lib/python3.5/dist-packages/object_detection-0.1-py3.5.egg/object_detection/exporter.py", line 28, in <module>

  File "/usr/local/lib/python3.5/dist-packages/object_detection-0.1-py3.5.egg/object_detection/builders/model_builder.py", line 30, in <module>
  File "/usr/local/lib/python3.5/dist-packages/object_detection-0.1-py3.5.egg/object_detection/models/faster_rcnn_inception_resnet_v2_feature_extractor.py", line 28, in <module>
ImportError: No module named 'nets'

我已经为此苦苦挣扎了几天，尝试了许多解决方案，但无济于事。我正在使用带有tensorflow-gpu版本的Ubuntu 16.04。