title: Python - Split a list of integers into positive and negative
body: <p>I'm learning python and i wanted to know whats the way to to split a list like :</p>
  
  <pre><code>A = [1, -3, -2, 8, 4, -5, 6, -7]
  </code></pre>
  
  <p>into two lists, one containing positive and the other one containing negative integers :</p>
  
  <pre><code>B = [1, 8, 4, 6]
  C = [-3, -2, -5, -7]
  </code></pre>