title: How to fix 'can't open file 'pip': [Errno 2] No such file or directory' when installing gekko
body: <p>I'm trying to install the gekko module in my python terminal using</p>
  <pre><code>python install -m pip gekko
  </code></pre>
  <p>but it is throwing an error not recognizing pip:</p>
  <pre><code>can't open file 'pip': [Errno 2] No such file or directory.
  </code></pre>
  <p>I'm using the terminal in Pycharm with Python 3.7</p>