Thank you Vjacheslav for you answer... I'll try again the 2 python packages because I have read the OK documentation and they sincerly appear me updated (in the last git branch).., but if I not reach the solution I'll write for raw json api request.. Valery has also written to me, kindly, giving me the link to a good javascript code to compare. I have to find time to work on it. thanks again. Ciao Gabriele