title: Export Excel files from Google Colab
body: <p>I use following codes to save some data frame data, in Google Colab. But it is saved in the "local file system", not in my computer nor Google Drive. How can I get the Excel file from there?
  Thanks!</p>
  
  <pre><code>writer = pd.ExcelWriter('hey.xlsx')
  df.to_excel(writer)
  writer.save()
  </code></pre>