title: Match password with Python regex
body: <p>The requirements for my password are:</p>
  
  <ul>
  <li><p>at least 10 symbols</p></li>
  <li><p>at least one digit</p></li>
  <li><p>at least one uppercase letter</p></li>
  <li><p>at least one lowercase letter</p></li>
  <li><p>only letters or digits</p></li>
  </ul>
  
  <p>So I want to use the re module to check my string input: <code>re.search(pattern, string)</code>.</p>
  
  <p>What should be my pattern here?</p>