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| l1 = [1,4,4,2,3,4,5,6,1] l2 = list(set(l1)) print(l2)
li=['a','b','c'] print(' '.join(str(i) for i in li))
index = li.index(num)
a=[1,2,6,8,0,3,4] b=[2,5,9] a.extend(b) a.[len(a):]=b
li = [1,4,4,2,3,4,5,6,1] li.sort(key=lambda x:x) sorted(li, key=lambda x:x )
li.reverse() li[::-1]
li = [[1,3],[8,10],[2,6],[15,18]] li.sort(key=lambda x:x[0])
li=[1,2,6,8,0,3,4]
li.append() li.insert(x,3)
li.pop() li.pop(0)
li=[] li.append() li.pop()
li=[] li.append() li.pop(0)
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