[note] python list sort & 去除重複

python list 太好用。

alist = [15,30,3,50,23,19,1,13,25,50,19,3,19,2,5]

set(alist)
set([1, 2, 3, 5, 13, 15, 50, 19, 23, 25, 30])

alist.sort()
[1, 2, 3, 3, 5, 13, 15, 19, 19, 19, 23, 25, 30, 50, 50]

sorted(set(alist))
[1, 2, 3, 5, 13, 15, 19, 23, 25, 30, 50]