删除python中列表中重复的项目

Question

假设我有一份清单

['a','man', 'and', 'a', 'woman']

如何删除重复的'a',使其仅为:

['a','man', 'and', 'woman']

Answer 1

保持秩序:

>>> from collections import OrderedDict
>>> L = ['a','man', 'and', 'a', 'woman']
>>> list(OrderedDict.fromkeys(L))
['a', 'man', 'and', 'woman']