title: Float number to 32 bits IEEE754 single precision is 64 bits
body: <p>When using this code</p>
  <pre><code>import bitstring
  f = 1.0e+00
  b = bitstring.pack('&gt;d', f)
  b.bin
  </code></pre>
  <p>I get 64 bits</p>
  <pre><code>001111111111000000000000000000000000000000000000000000000000000
  </code></pre>
  <p>But I need to get Float (IEEE754 Single precision 32-bit)</p>
  <p>What is the &gt;d used for?</p>