input: import urllib.parse
  
  def parse_url(url: str) -> str:
      """Parses the given URL and returns a string with the protocol, domain name, and path.
      >>> parse_url('https://www.example.com/path/to/file')
      'Protocol: https\nDomain name: www.example.com\nPath: /path/to/file'
      """
      parsed_url = urllib.parse.urlparse(url)
      protocol = parsed_url.scheme
      domain_name = parsed_url.netloc
      path = parsed_url.path
      return f'Protocol: {protocol}\nDomain name: {domain_name}\nPath: {path}'
output:     parsed_url = urllib.parse.urlparse(url)
      protocol = parsed_url.scheme
      domain_name = parsed_url.netloc
      path = parsed_url.path
      return f'Protocol: {protocol}\nDomain name: {domain_name}\nPath: {path}'