python: using the set
Python 3.5.4 (v3.5.4:3f56838, Aug 8 2017, 02:17:05) [MSC v.1900 64 bit (AMD64)] on win32
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>>> a=[1,2,3,4,5,3,2,1]
>>> a
[1, 2, 3, 4, 5, 3, 2, 1]
>>> set(a)
{1, 2, 3, 4, 5}
>>>
matlab: Use UNIQUE (A) returns a list consisting of the elements will not be repeated in A, corresponding to a set of transfer list.
