title: get part of an email follow a pattern
body: <p>Input: abc@xyz.com</p>
  <p>Output: xyz</p>
  <p>my code is below</p>
  <pre><code>email = &quot;123@helloworld.com&quot;
  new_email = email.split('@')[1]
  domain = new_email.split('.')[0]
  </code></pre>
  <p>Please help me with other methods to get the part of it?</p>