Find the SID

Hello,
I am writing a script for which I need the sid of the channel in the course of display. I don'y find it in the files of the dream /tmp/ecm.info.
In which file can I find this information (in a automatic way)? Is there a specific parameter setting of the cccam.cfg to get back this information?
Is there only a python's way ? In this case, how could i do ?
Thank you in advance for your help.