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I closed the window containing the PyCharm project and reopened the project: it worked. I have no idea why it didn't work before reopening the PyCharm project. Very strange: I don't see what could ...
#1: Initial revision
I closed the window containing the PyCharm project and reopened the project: it worked. I have no idea why it didn't work before reopening the PyCharm project. Very strange: I don't see what could cause "Run" to disappear from the option in the run/debug config window. It's back now:  Same code, same python interpreter, same pycharm project, same everything as far as I know.