title: after pip successful installed: ModuleNotFoundError
body: <p>I am trying to install the SimPy module so that I can use it in IDLE. However, everytime I try to import in IDLE, I got an error. I already tried reinstalling Python and Pip and tried to modify the location of the apps. SimPy can be found in the directory of Python 2.7. I'm using python 3.6.1. </p>
  
  <p>After I correctly installed simpy in the terminal: </p>
  
  <pre><code>pip install simpy
  Requirement already satisfied: simpy in /Library/Python/2.7/site-packages
  </code></pre>
  
  <p>When I put into IDLE:</p>
  
  <pre><code>Import Simpy
  </code></pre>
  
  <p>I got the error:</p>
  
  <pre><code>    Traceback (most recent call last):
    File "&lt;pyshell#3&gt;", line 1, in &lt;module&gt;
      import simpy
  ModuleNotFoundError: No module named 'simpy'
  </code></pre>
  
  <p>How can I solve this?</p>