python中将制定元素保留为唯一

概述 >>>a=["aa","aa","bb","cc","bb","aa","dd","cc","aa","aa","aa"]>>>a['aa','aa','bb',&#03

 

>>> a = ["aa","aa","bb","cc","bb","aa","dd","cc","aa","aa","aa"]>>> a['aa', 'aa', 'bb', 'cc', 'bb', 'aa', 'dd', 'cc', 'aa', 'aa', 'aa']>>> b = sorted(List(set(a)))>>> b['aa', 'bb', 'cc', 'dd']>>> for i in b:    a.count(i)    6221>>> for i in range(a.count("aa")-1):    a.remove("aa")    >>> for i in b:    a.count(i)    1221>>> a['bb', 'cc', 'bb', 'dd', 'cc', 'aa']

 

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