title: FileNotFoundError: [Errno 2] No such file or directory (python error)
body: <p>I'm new to python and I'm trying to learn it using Google Colab
  I'm trying to open a CSV file, but I just can't do it.</p>
  <pre><code>import csv
  open(r'C:\Users\User\Desktop\username.csv')
  
  ---------------------------------------------------------------------------
  FileNotFoundError                         Traceback (most recent call last)
  &lt;ipython-input-30-d948a291431c&gt; in &lt;module&gt;()
        1 import csv
  ----&gt; 2 open(r'C:\Users\User\Desktop\username.csv')
  
  FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\User\\Desktop\\username.csv'
  </code></pre>
  <p>I've already searched for similar questions, mostly of them sugest the problem is the (r'C:\completelocalfile), but I already tried, as you can see on my code, however it's not working for me. Any sugestions?</p>