--LUApythonstr.split()table
--a="1,2,3"{1,2,3}

a="1,2,3,4,"    -- a="1,2,3,4" ","
t={}

for w in string.gmatch(a,"([^',']+)") do     --,
    table.insert(t,w) 
end

for k,v in ipairs(t) do 
    print(k..":"..v) 
end