title: pip failling to install for Python 3.7 on MacOs
body: <p>I'm currently working on a Mac with Mojave. I have successfully installed python 3.7 with brew</p>
  
  <pre><code>    brew install python3
  </code></pre>
  
  <p>But I have tried several methods to install pip for python 3.7 (installing with get-pip.py, easy_install pip, etc.), which had worked for installing pip in the python 2.7 folder, but not in the python 3.7.</p>
  
  <p>Currently when I call </p>
  
  <pre><code>  pip --version
  </code></pre>
  
  <p>I get </p>
  
  <pre><code>pip 18.1 from /Library/Python/2.7/site-packages/pip (python 2.7)
  </code></pre>
  
  <p>And pip3 seems not to exist.</p>
  
  <p>How can I get pip3 installed in the python 3.7 folder? Thanks!</p>