code: def _split_docker_link(alias_name):
      
      sanitized_name = alias_name.strip().upper()
      split_list = re.split(r':|//', core.str('{0}_PORT'.format(sanitized_name)))
      # filter out empty '' vals from the list with filter and
      # cast to list (required for python3)
      return list(filter(None, split_list))
docs: Splits a docker link string into a list of 3 items (protocol, host, port).
      - Assumes IPv4 Docker links
  
      ex: _split_docker_link('DB') -> ['tcp', '172.17.0.82', '8080']