Kill idle Redis connections

hitman.lua

local l = redis.call('client', 'list')
local k = 0

for r in l:gmatch('[^\n]+') do
  for c,i in r:gmatch('addr=(.+:%d+).*idle=(%d+).*') do 
    if tonumber(i) > tonumber(ARGV[1]) then
      redis.call('client', 'kill', c)
      k = k + 1
    end
  end
end

return(k)

There is a python a script here
https://pranavprakash.net/2016/02/05/kill-idle-connections-to-redis/