input: 
  def parse_url(url: str) -> tuple:
      """
      Parse the given URL and return a tuple containing the protocol, domain name, and path.
      >>> parse_url('https://www.example.com/path/to/file')
      ('https', 'www.example.com', '/path/to/file')
      """
      from urllib.parse import urlparse
  
      parsed_url = urlparse(url)
      
      # Get the protocol
      protocol = parsed_url.scheme
  
      # Get the domain name
      domain_name = parsed_url.netloc
  
      # Get the path
      path = parsed_url.path
  
      return protocol, domain_name, path
  
output:     return protocol, domain_name, path