title: os.walk error , can't fill list with file names
body: <p>I'm learning "Google colab" and got some problem with data reading. I've written a python script for filling folders names into arrays, but it doesn't fill at even one.</p>
  
  <pre class="lang-py prettyprint-override"><code>TEST_PATH = "/content/gdrive/'My Drive'/test/"
  test_ids= []
  try:
      test_ids = next(os.walk(TEST_PATH))[1]
  except StopIteration:
      pass
  </code></pre>
  
  <p>list "test_ids" still empty, but there are some folders with files in TEST_PATH:
  <a href="https://i.stack.imgur.com/MP92R.png" rel="nofollow noreferrer">here you can check it</a></p>