+local io = require "io"
+local math = require "math"
+local table = require "table"
+local debug = require "debug"
+local ldebug = require "luci.debug"
+local string = require "string"
+local coroutine = require "coroutine"
+local tparser = require "luci.template.parser"
+
+local getmetatable, setmetatable = getmetatable, setmetatable
+local rawget, rawset, unpack = rawget, rawset, unpack
+local tostring, type, assert = tostring, type, assert
+local ipairs, pairs, loadstring = ipairs, pairs, loadstring
+local require, pcall, xpcall = require, pcall, xpcall
+local collectgarbage, get_memory_limit = collectgarbage, get_memory_limit
+
+--- LuCI utility functions.
+module "luci.util"
+
+--
+-- Pythonic string formatting extension
+--
+getmetatable("").__mod = function(a, b)
+ if not b then
+ return a
+ elseif type(b) == "table" then
+ for k, _ in pairs(b) do if type(b[k]) == "userdata" then b[k] = tostring(b[k]) end end
+ return a:format(unpack(b))
+ else
+ if type(b) == "userdata" then b = tostring(b) end
+ return a:format(b)
+ end
+end
+