code: def names(self):
          
          found_names = []
          with open(self.filename) as f:
              content = f.readlines()
          for line in content:
              line = line.strip()
              if " " in line:
                  attribute, value = line.split(" ", 1)
                  attribute = attribute.strip()
                  value = value.strip()
                  if attribute.lower() in ['host']:
                      found_names.append(value)
          return found_names
docs: The names defined in ~/.ssh/config
          :return: the names