UniqueTupleInList.py

# UniqueTupleInList.py by gauravssnl
# generates a list unique (a,b) pair for a range of number such that (b,a) does not appear in list & a != b

n = range(1,5)
L = [ (x,y) for x in n for y in n if x!= y   ]
S = [ ]
for t in L :
    if tuple( set(t)) not in t :
        S.append(t)

print S