Python-style string formatting in Julia with floating point support

gistfile1.jl

function format(s, args...)
    # Python-style string formatting with floating point support
    # Note that this is 1-based to be more Julian
    result = deepcopy(s)
    for (i, x) in enumerate(args)
        q = Regex("{$i(:\.([0-9])+f)?}")
        next = result
        for m in eachmatch(q, result)
            val = x
            if m.captures[2] != nothing
                precision = parseint(m.captures[2])
                val = round(x * 10^precision) / 10.0^precision
            end
            next = replace(next, m.match, val)
        end
        result = next
    end
    result
end

Also note that this method is not about speed, it's about functionality. There are faster ways to do this for sure, but this is a quick and dirty solution that works like I wanted it to.