title: How do you assert something is not true in Python?
body: <p>In trying to understand <code>assert</code> in Python, specifically inverting it, I came up with this...</p>
  
  <pre><code>&gt;&gt;&gt; assert != ( 5 &gt; 2 )
  &gt;&gt;&gt; assert != ( 2 &gt; 5 )
  </code></pre>
  
  <p>Now the first line fails and the second passes. What's the idiomatic way to assert something is false?</p>