>>> # a swapping variant >>> def swap(a, b): ... ab = [a, b] ... ab[1], ab[0] = ab[0], ab[1] ... return ab[0], ab[1] ... >>> a = 111 >>> id(a) 505627864 >>> b = 999 >>> id(b) 58278640 >>> a, b = swap(a, b) >>> a, id(a) (999, 58278640) >>> b, id(b) (111, 505627864)
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