Update: this problem seems to extend to any file that is automatically synchronized to iCloud. For instance, if my program updates a json file or if I edit any Python file, I have to kill Pythonista and restart it, I cannot just hit run (nothing happens if I just hit run). On my devices, CSV files are not synchronizing automatically to iCloud. If my program changes a Csv file, I can rerun the program without having to first kill and restart Pythonista.
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This is the community forum for my apps Pythonista and Editorial.
For individual support questions, you can also send an email. If you have a very short question or just want to say hello — I'm @olemoritz on Twitter.