title: Placing a new value into a section of a big Python bitarray
body: <p>Using Python 2.7 and bitarray 0.8.1 to hold several sequenced register values (registers can be from 16 to 512 Byte long).
  I want to set a value to a specific part of this bitarray?</p>
  
  <p>For example:</p>
  
  <pre><code>from bitarray import bitarray
  BYTE = [False, False,False, False, False, False, False, False]
  reg = bitarray(512*BYTE, endian='big')
  </code></pre>
  
  <p>How to set the value 0xaa to bits 2048:2055 of reg?</p>