get each pair from a string.

[Neil Cerutti]

On 2012-10-23, wxjmfauth at gmail.com <wxjmfauth at gmail.com> wrote:
> Why bother with speeed?

Because the differences between O(N), O(log(N)) and O(N ** 2)
operations are often relevant.

A Python string replace function experiencing a slow-down from
previous versions doesn't absolve me from making informed choices
of algorithm and implentation.

-- 
Neil Cerutti