function trim(s)
    return (s:gsub("^%s*(.-)%s*$", "%1"))
end

function conky_fmt(format, a)
    return string.format(format, tonumber(trim(conky_parse(a))))
end

function conky_fmt2(format, a, b)
    as = conky_parse(a)
    bs = conky_parse(b)

    return string.format(format, as, bs)
end