input: Write a function to validate a list of emails. The function should return a boolean indicating whether a given email address is valid.
  
  def validate_mail_list(mail_list):
      for mail in mail_list:
          if not re.match("[^@]+@[^@]+\.[^@]+", mail):
              return False
      return True
  
  assert validate_mail_list(["example.user@gmail.com", "bad@example"]) == False
  assert validate_mail_list(["test@test.com", "user@domain.com"]) == True
  assert validate_mail_list(["no.dot@domain"]) == False
  assert validate_mail_list([]) == True
output: def validate_mail_list(mail_list):
      for mail in mail_list:
          if not re.match("[^@]+@[^@]+\.[^@]+", mail):
              return False
      return True