> > Your particular question is itself a FAQ > <URL:https://docs.python.org/3/faq/design.html#why-does-python-use-methods-for-some-functionality-e-g-list-index-but-functions-for-other-e-g-len-list>. > Please don't refer the FAQ entry. See this: https://bugs.python.org/issue27671 -- INADA Naoki <songofacandy at gmail.com>