title: brew install python3 didn't install pip3
body: <p>I installed python3 using homebrew but it didn't install pip3 or should I say it installed but it doesn't recognize the command ?</p>
  
  <p>Here is what I did:</p>
  
  <pre><code>brew install python3
  </code></pre>
  
  <p>This installed python3 but threw an error at the end saying it couldn't link python3 and prompted me to run </p>
  
  <pre><code>brew link python3
  </code></pre>
  
  <p>to link the installation but this throws another error:</p>
  
  <pre><code>Linking /usr/local/Cellar/python3/3.6.3... Error: Permission denied @ dir_s_mkdir - /usr/local/lib 
  </code></pre>
  
  <p>Does anyone know how solve this ? 
  When I run:</p>
  
  <pre><code>brew info python3
  </code></pre>
  
  <p>It says:</p>
  
  <pre><code>==&gt; Caveats
  Pip, setuptools, and wheel have been installed. To update them
    pip3 install --upgrade pip setuptools wheel
  
  You can install Python packages with
    pip3 install &lt;package&gt;
  
  They will install into the site-package directory
    /usr/local/lib/python3.6/site-packages
  
  See: https://docs.brew.sh/Homebrew-and-Python.html
  </code></pre>
  
  <p>Which makes me think pip3 is installed but not recognized. Any help is appreciated.</p>
  
  <p>INFO:</p>
  
  <p>OS => MacOS High Sierra 10.13.1</p>
  
  <pre><code> pip3 install twilio
  -bash: pip3: command not found
  </code></pre>