title: how to fix' no module name: object_objection.box_coders'?
body: <p>ModuleNotFoundError on <a href="https://pypi.org/project/object-detection/" rel="nofollow noreferrer">object-detection</a></p>
  
  <blockquote>
    <p>Error StackTrace</p>
  </blockquote>
  
  <pre class="lang-py prettyprint-override"><code>Traceback (most recent call last):
    File "train.py", line 58, in &lt;module&gt;
      from object_detection.builders import model_builder
    File "C:\Program Files\Python37\lib\site-packages\object_detection-0.1-py3.7.egg\object_detection\builders\model_builder.py", line 21, in &lt;module&gt;
      from object_detection.builders import box_coder_builder
    File "C:\Program Files\Python37\lib\site-packages\object_detection-0.1-py3.7.egg\object_detection\builders\box_coder_builder.py", line 17, in &lt;module&gt;
      from object_detection.box_coders import faster_rcnn_box_coder
  ModuleNotFoundError: No module named 'object_detection.box_coders'
  </code></pre>