This is really just a note to myself and others who may encounter the Python IDLE performing a saveAs every time command/ctrl S shortcut is performed. This happened to me while working on some Python code. After looking around for what could be the issue I found that if CapsLock is turned on the save shortcut becomes a SaveAs function. Seems pretty strange to me as I see no real reason for this. Nonetheless, simple enough to get around, just mildly frustrating in the moment. Turn off your CapsLock.