title: What does "variable or 0" mean in python?
body: <p>What is the meaning of the following statement in python:</p>
  
  <pre><code>x = variable_1 or 0
  </code></pre>
  
  <p><code>variable_1</code> is an object. What value does <code>x</code> have above? And what is the type of <code>x</code>?</p>