Data source ingest modue

I took an image from Android and analyzed it by Autopsy. Now, I’m stuck with ingest module, I’ve written the python data source module. Then, Tools —> python plugin and I placed the code here. When I run the ingest module, it appears nothing?
From my understanding, if the ingest module works, the result will appear in the artifacts on the left-hand side, but there is nothing. I looked at messages and it says there is (found 0 files), in this case where is the issue? in my python code?

Would it be possible to post your module code to see what it is doing?