title: pip installation of gmpy2
body: <p>When I used pip to install gmpy2, I always got the version 1.16, i.e. gmpy instead of gmpy2.</p>
  
  <pre><code>$ pip search gmpy
  gmpy                      - GMP or MPIR interface to Python 2.4+ and 3.x
    INSTALLED: 1.16 (latest)
  </code></pre>
  
  <p>Is there any way to directly install gmpy2 through pip?</p>