title: Best practice for representing floating infinity in python 3.x
body: <p>Since a very large floating value can be represented as follows:
  <code>sys.float_info.max</code> and <code>float(&quot;inf&quot;)</code>.</p>
  <p>Is one better than the other? If yes, under what circumstances?</p>
  <p>Or which is one more preferred for scientific computing?</p>