input: def validate_email_list(mail_list: List[str]) -> bool:
      """ Check if in given list of emails, all emails are valid according to a simple regex pattern.
      >>> validate_email_list(["example.user@gmail.com", "bad@example"])
      False
      >>> validate_email_list(["valid.user@gmail.com", "another.valid@example.net"])
      True
      """
output:     import re
      pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
      for email in mail_list:
          if not re.match(pattern, email):
              return False
      return True