Pytest simple tests - success output

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$ pytest test_mymod_1.py

===================== test session starts ======================
platform darwin -- Python 3.5.2, pytest-3.0.7, py-1.4.33, pluggy-0.4.0
rootdir: /examples/python/pt, inifile:
collected 1 items

test_mymod_1.py .

=================== 1 passed in 0.03 seconds ===================