title: What happened to numpy.chararray
body: <pre><code>#Input: 
  chararr = np.chararray((3, 5))
  chararr[:] = 'a'
  chararr
  
  #Output: 
  chararray([[b'a', b'a', b'a', b'a', b'a'],
     [b'a', b'a', b'a', b'a', b'a'],
     [b'a', b'a', b'a', b'a', b'a']], 
    dtype='|S1')
  </code></pre>
  
  <p>My question is where does that 'b' come from ... I got this from jupyter notebook and PyCharm</p>