What to do if PyInstaller3.5 gives an error in Python3.8 (TypeError: an integer is required (got type bytes))

Event

At the time of article posting (2019/11/27), when running PyInstaller with Python 3.8, the following error occurs

TypeError: an integer is required (got type bytes)

Reason for error

This is because PyInstaller3.5, which is the current (2019/11/27) stabilizer, does not support Python3.8.

counter-measure

Download the Development version. If you install with pip, it is as follows.

pip install https://github.com/pyinstaller/pyinstaller/archive/develop.tar.gz

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