title: How to add comma between numbers in a numpy array?
body: <p>I'm wondering is there anyway to add a comma between numbers.</p>
  <p>For example: <code>[0.44346713 0.70174108 0.46043481 0.82511308 0.71445151]</code><br />
  to <code>[0.44346713, 0.70174108, 0.46043481, 0.82511308, 0.71445151]</code>  in python</p>
  <p>Thus, i can call each number in an array(e.g., list[0], list[2]...)</p>