title: python3: can't open file 'drive/My Drive/damage/custom.py': [Errno 2] No such file or directory
body: <p>I am training Mask R-CNN on my own dataset and when I change runtime type in google colab to "GPU" the following error occurs</p>
  
  <pre><code>python3: can't open file 'drive/My Drive/damage/custom.py': [Errno 2] No such file or directory
  </code></pre>
  
  <p>But when I change the runtime to "None" the training starts normally. How should I fix it?</p>