Currently when I try to use python-pptx on Python 3.9 to save a new .pptx file, I get the following error: Traceback (most recent call last): File "test.py", line 19 ...

I think this line of code in test.haha.py is the cause of the error. But I don't know why: Situation 1: use pytest -sv -m test; everything thing is ok! Situation 2 ...