I have PyCharm CE, Phthon 3.5 running on iOS 10.11.5. I create the file, etc., and something runs, but nothing appears. If I cut and paste the file (simply: print("Hello, World") into the Python Consol it works. So does 2+2. But if I click Run (any of four places, green arrow upper right corner, lower left Run window, or the two Run options under the Run menu, I don't see any results. After a flash it says: Process finished with exit code 0. Empty test suite. and No tests were found. The same things happens whether I choose Python Consol or Terminal in the Run/ lower left window.
I don't know where I've set something about tests up, but more importantly I don't get any output. I'm probably missing something obvious but I'm stuck.