l1 = ['b','c','d','b','c','a','a'] l2 = list(set(l1)) print l2
l1 = ['b','c','d','b','c','a','a']
l2 = {}.fromkeys(l1).keys()
print l2
['a', 'c', 'b', 'd']
l1 = ['b','c','d','b','c','a','a'] l2 = list(set(l1)) l2.sort(key=l1.index) print l2
l1 = ['b','c','d','b','c','a','a'] l2 = sorted(set(l1),key=l1.index) print l2
l1 = ['b','c','d','b','c','a','a']
l2 = []
for i in l1:
if not i in l2:
l2.append(i)
print l2
l1 = ['b','c','d','b','c','a','a'] l2 = [] [l2.append(i) for i in l1 if not i in l2] print l2
['b', 'c', 'd', 'a']
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