使用filter函数，实现一个条件判断函数即可。
比如想过滤掉字符串数组中某个敏感词，示范代码如下：
#filter out some unwanted tags def passed(item): try: return item != "techbrood" #can be more a complicated condition here except ValueError: return False org_words = [["this","is"],["demo","from"],["techbrood"]] words = [filter(passed, item) for item in org_words]
注意Python2.x和Python3.x对于filter/map的处理并不兼容，在Python2.x里面直接返回一个list.
在Python3.x里返回一个iterable对象，比如
可以使用list(words)转换。
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