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巧妙使用reduce
In [5]: ids = [1,4,3,3,4,2,3,4,5,6,1]
In [6]: func = lambda x,y:x if y in x else x + [y]
In [7]: reduce(func, [[], ] + ids)
Out[7]: [1, 4, 3, 2, 5, 6]
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如果不保持顺序，只需要转为set即可
ids = list(set(ids))
In [5]: ids = [1,4,3,3,4,2,3,4,5,6,1]
In [6]: func = lambda x,y:x if y in x else x + [y]
In [7]: reduce(func, [[], ] + ids)
Out[7]: [1, 4, 3, 2, 5, 6]
ids = list(set(ids))
本文标题：【转】python list 保持顺序去重复
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