Nvidia graph composer with python codelet example

Hi,
I am trying to develop an IVA app for Orin using Graph composer. I need some customization and read that the python codelet can be integrated with graphs. I am not sure how to do that. Are there any sample apps available to demonstrate the codelet integration with graphs?

Please feel free to suggest any better ways than the above, if available.

Thank you.
P. Gnanavelu