在Python列表中删除重复的项目

Question

Let say I have a list of

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

How do I remove the repeated 'a' so that it will only be:

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

Answer 1

Keeps order:

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

Answer 2

If the order is not important, then you can just do:

d = ['a', 'man', 'and', 'a', 'woman']
list(set(d))

Answer 3

如果顺序很重要，类似@ jamylak的一个建议，就是用这个 OrderedSet配方。

list(OrderedSet(L))