def unique(seq): #return [x for x in my_list if x not in locals()[&＃39;_[1]&＃39;]] return {}.fromkeys(seq).keys() dict.fromkeys(seq,val&＃61;None) #创建并返回一个新字典&＃xff0c;以序列seq中元素做字典的键&＃xff0c;val为字典所有键对应的初始值(默认为None)
例子&＃xff1a;1&＃xff0c; >>> l &＃61; [1,2,3] >>> a3 &＃61; {}.fromkeys(l) >>> print a3 {1: None, 2: None, 3: None} >>> len(a3) 3 2&＃xff0c;>>> d &＃61; {}.fromkeys(l).keys() >>> print d [1, 2, 3] >>> len(d) 3
还可对list和string去重
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