cmp
Python 2
cmp(x, y), compare two objects, need to override __cmp__ for user defined type
The return value is negative if x < y, zero if x == y and strictly positive if x > y
l = [1, 2, 3, 4] print cmp(l, [1, 2, 3, 4]) # 0
Python 3
cmp() has been removed in Python 3