title: Changing PYTHONPATH on mac
body: <p>So I tried to change PYTHONPATH in mac terminal and this is how it went:</p>
  
  <pre><code>&gt;&gt;&gt; PYTHONPATH = "${PYTHONPATH}:~/Desktop/Python/Modules"
  &gt;&gt;&gt; export PYTHONPATH
  File "&lt;stdin&gt;", line 1
  export PYTHONPATH
                  ^
  SyntaxError: invalid syntax
  </code></pre>
  
  <p>What am I doing wrong?</p>