Pythonic way to sum n-th list element?

[Skip Montanaro]

    Guy> What is the most Pythonic way to sum the n-th element of a list of
    Guy> lists (or of tuples)?

    Guy> The obvious (to me) way is to use reduce, a list comprehension, and
    Guy> a lambda:
    ...
    Guy> But I don't really like lambda, is there a better way to do this?

You can use the add function in the operator module:

    >>> import operator
    >>> x = (("a", 1), ("b", 2), ("c", 3))
    >>> reduce(operator.add, [y[1] for y in x], 0)
    6

Skip