title: how to not install package with pip to anaconda
body: <p>I have problem about pip.</p>
  
  <p>When I want to install some package, for instance flask, It wants to install it to /anaconda3. </p>
  
  <pre><code>juldou@juldou-machine:~$ pip install flask
  Requirement already satisfied (use --upgrade to upgrade): flask in ./anaconda3/lib/python3.5/site-packages
  </code></pre>
  
  <p>I know that I already have flask, but I don't want install it to anaconda. </p>
  
  <p>How to exit pip of anaconda and set other environment, or what to do with it?
  Sorry, but I don't understand basics of concept. </p>