python怎么去重

>>> lst1 = [2, 1, 3, 4, 1]

>>> temp = []

>>> for item in lst1:

    if not item in temp:

    temp.append(item)

>>> print(temp)

[2, 1, 3, 4]

>>> lst1 = [2, 1, 3, 4, 1]

>>> temp = []

>>> [temp.append(i) for i in lst1 if not i in temp]

[None, None, None, None]

>>> print(temp)

[2, 1, 3, 4]

>>> lst1 = [2, 1, 3, 4, 1]

>>> lst2.sort(key=lst1.index)

>>> print(lst2)

[2, 1, 3, 4]

>>> lst1 = [2, 1, 3, 4, 1]

>>> lst2 = sorted(set(lst1), key=lst1.index)

>>> print(lst2)

[2, 1, 3, 4]

>>> data = [2, 1, 3, 4, 1]

>>> [item for item in data if data.count(item) == 1]

>>> data = [2, 1, 3, 4, 1]

>>> list(filter(lambda x:data.count(x) == 1, data))

[2, 3, 4]