title: Colab can't find a file
body: <pre><code>training_dataset_file = open('C:/Users/kbg04289/Desktop/mnist_train.csv', 'r')
  </code></pre>
  
  <p>I tried several methods
  like 'making address with \' and checking path.</p>
  
  <p>Only google colab makes trouble, however jupyter notebook and visual studio code does well.</p>