title: How to configure Atom to run Python3 scripts?
body: <p>In my terminal, I type <code>$ which python3</code>, outputting </p>
  
  <pre><code>/opt/local/bin/python3
  </code></pre>
  
  <p>I would like to configure Atom to run Python3 scripts. In my Atom Config, I have </p>
  
  <pre><code>runner:
  python: "/opt/local/bin/python3"
  </code></pre>
  
  <p>However, if I run the following script in some script named <code>filename.py</code>,</p>
  
  <pre><code>import sys
  print(sys.version)
  </code></pre>
  
  <p>I get the following output: </p>
  
  <pre><code>2.7.11 (default, Feb 18 2016, 22:00:44) 
  [GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)]
  </code></pre>
  
  <p>How exactly does one set up the PATH for Python3.x scripts to run correctly? Is there a different package I could use? </p>