title: Can't import bert.tokenization
body: <p>I am using Google Colab and the following import doesn't work somehow:</p>
  
  <pre><code>from bert.tokenization import FullTokenizer
  </code></pre>
  
  <p>I am getting this error:</p>
  
  <pre><code>ModuleNotFoundError: No module named 'bert.tokenization'
  </code></pre>
  
  <p>I tried to install bert by running the following command:</p>
  
  <pre><code>!pip install  --upgrade bert
  </code></pre>
  
  <p>Any idea how to resolve this error?</p>