title: Hexify sha digest result without using hashlib
body: <p>I've got digest value of data in string format, and I'd like to hexify it.</p>
  
  <p>Here's the sample string <code>'\xf0z\xd8[\xfc\x7f'</code></p>
  
  <p>However, I cannot use <code>hashlib</code> since I don't have the original data from which the hash was created from. </p>
  
  <p>trying <code>.digesthex()</code> on the string wouldn't work since <code>str</code> object don't have that method. Is there any alternative ?</p>