to get the code coverage of a folder [duplicate]

This question already has an answer here:

• How can you get unittest2 and coverage.py working together? 4 answers

How to get coverage report for the unittests under following folder structure?

- py
  - __init__.py
  - file1.py
  - file2.py
- tests
  __init__.py
  - test_file1.py
  - test_file2.py

I am not able to figure it out & yes it is not duplicated question as that wont work on such folder structure. please read question before marking as duplicated.