Get energy without launching application

It is possible to get energy by providing pid only?

I have installed this package in local and tried to modify the code by providing pid in the command for ex : tidevice energy

Here is the modified code:

But the data is not coming, so I've modified the code and print the result directly like this: (last second line print(ret))

So after doing this I observed the output and it's always coming blank({}) even I'm using the application and have verified the pid as well using tidevice ps command.

Any idea why data is not coming and how should we resolve this?