BruceXiaoYY的博客

NamespacesEverything in Python is an object. A name helps Python to invoke the object that it refer to. A namespace is a space that holds a bunch of names. Imagine it a ‘namespace table’ or a ‘namespa

BS4BeautifulSoup是用来从HTML or XML中提取数据的Python lib。BeautifulSoup将文档转化为树形结构（DOM），每个节点都是下述四种类型的Python对象： BeautifulSoup <class 'bs4.BeatifulSoup'> Tag <class 'bs4.element.Tag'> NavigableString <class 'bs4.el

__repr__, callsed by built-inrepr(), return string representation of a set __str__, called by built-instr() Phython Set - unordered - makes the elements uniqure >>> list = [1,1,2,2,3,3] >>> s