[Python] Python lambda returns 0

Is there a simple way to return 0 with a lambda function using and and or operators? For example, consider this function to sum elements in an array:

sum = lambda tab: tab == [] and 0 or tab[0] + sum(tab[1:])


Neutral element for number addition is 0 so it produces an IndexError: 0 is a falsy value.

Thus with multiplication it works:

>>> prod = lambda tab: tab == [] and 1 or tab[0] * prod(tab[1:])
>>> prod([1, 2, 3])
6


Other numbers than 0, for example 1, are truthy.

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