What's the difference between expression and statement using Python yield
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/19132/expression-versus-statement">Expression Versus Statement</a>  </p>
</blockquote>



<p>What's the difference between <strong>expression</strong> and <strong>statement</strong> in Python?</p>

<p>I have never thought of this question until I am learning Python generator that said "<strong>use yield as an expression</strong>"</p>

<p>Also, can you explain this question in the context of Python generator that 'use yield as an expression'?</p>
