title: pip install can't find the latest version advertised by pip search
body: <p>Trying to install the latest version of pandas on my ubuntu 16.04 through <code>pip install</code></p>
  
  <p>If I read well the result of this command:</p>
  
  <p><code>python3 -m pip search pandas</code></p>
  
  <pre><code>...
  pandas (0.25.3)                     - Powerful data structures for data analysis, time series, and statistics
    INSTALLED: 0.24.2
    LATEST:    0.25.3
  ...
  </code></pre>
  
  <p>I should be able to install version 0.25.3 of that package.</p>
  
  <p>I tried </p>
  
  <ul>
  <li><code>pip install --upgrade pandas --user</code>, which tells me that I already have the latest version</li>
  <li><code>pip install --upgrade --upgrade-strategy eager pandas  --user</code>, that installed up-to-date versions of dependencies, but pandas is still 0.24.2</li>
  <li><code>python3 -m pip install pandas==0.25.3 --user</code> which tells me that specific version can't be found, and provides me with a very long list of available versions stopping indeed at version 0.24.2</li>
  </ul>
  
  <p>Am I misinterpreting something ?</p>
  
  <p>Thanks for your help</p>