input: Write a python function to classify emails as 'Valid' or 'Invalid'.
  assert classify_email(['example@example.com', 'invalidemail', 'user@domain.com']) == ['Valid', 'Invalid', 'Valid']
  assert classify_email(['hello@world.net', 'notanemail', 'another@valid.com']) == ['Valid', 'Invalid', 'Valid']
  assert classify_email(['test@test.org', '', 'noatsign.com']) == ['Valid', 'Invalid', 'Invalid']
output: def classify_email(emails):
      import re
      email_regex = re.compile(r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$')
      return ['Valid' if email_regex.match(email) else 'Invalid' for email in emails]