title: convert negative scientific notation 1.3E-2 to float?
body: <p>I understand that I can convert a number in scientific notation to a float with <code>float</code> like this:</p>
  
  <pre><code>&gt;&gt;&gt; x = 1.3e8
  &gt;&gt;&gt; float(x)
  130000000.0
  </code></pre>
  
  <p>Then, why can I not do the same thing with a negative exponent?</p>
  
  <pre><code>&gt;&gt;&gt; x = 1.3e-8
  &gt;&gt;&gt; x
  1.3e-08
  &gt;&gt;&gt; float(x)
  1.3e-08
  </code></pre>
  
  <p>I would have expected for <code>float(x)</code> in the last case to give <code>0.000000013</code></p>