title: Python - package not found although it is installed
body: <p>I have the following version of python</p>
  
  <pre><code>import sys
  print(sys.version)
  
  3.6.5 | packaged by conda-forge | (default, Apr  6 2018, 13:44:09) 
  [GCC 4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)]
  </code></pre>
  
  <p>I installed a package with the following command</p>
  
  <p><code>pip install wfdb</code></p>
  
  <p>It is succesfully installed because when I then write the command: </p>
  
  <p><code>pip show wfdb</code></p>
  
  <p>The following information appears
      Location: 
      /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages</p>
  
  <p>However, when I type the command <code>import wfdb</code> in Python notebook or the version of python in terminal, I get the following message</p>
  
  <p><code>No module named 'wfdb'</code></p>
  
  <p>Does it have to do with the path on which python is checking where the packages are? How to check this and how to change it?</p>