title: Why is the output of werkzeugs `generate_password_hash` not constant?
body: <p>When I run <code>werkzeug.security.generate_password_hash("Same password")</code> (<a href="https://werkzeug.palletsprojects.com/en/0.15.x/utils/#werkzeug.security.generate_password_hash" rel="noreferrer">docs</a>) multiple times, the output is different each time.</p>
  
  <p>What am I doing wrong? Why is it not constant?</p>