Hi Swapnil,
You can run Pytest from within robot framework, and as you will see in the thread linked below if you use a python wrapper function to call your Pytest functions you can then use the robot framework python API’s to return the test results back to a robot framework result
It’s not really a recommended solution but it may give you what you want.
Other than that I don’t know, I don’t use pytest.
Hope that helps,
Dave.