How to launch the file and see the result

python3 _01_first_step.py -v 
python3 _02_more_complex_object_to_test.py.py -v 
python3 _03_blank_line_management.py -v 
python3 _04_test_an_exception.py -v
python3 _05_work_with_class.py -v 
python3 _06_external_doc/_01_external_doc_test.py -v 
python3 -m doctest -v _07_structured_doctest/main_doctest.rst 
python3 _08_run_unittest_suite.py -v