Binary package “python3-coverage-dbg” in ubuntu xenial

code coverage tool for Python 3 – debug library

 The ‘coverage’ library measures which parts (statements) of a Python
 program are executed while it is run. This is useful for testing:
 those parts of a program that are not executed by the tests have not
 been tested.
 .
 This package contains the debugging symbols and debug build for the C
 extension libraries in ‘python3-coverage’.