You can't change existing Python version which is installed as package by Alteryx Server , so it will remain 3.8. But there is option to install multiple version of python on the same server. You need to explicitly install Python 3.7 in a different directory and point your workflows to use the 3.7 version's python directory using command tool. OR keep the python file in .py format on the server and run python.exe from the location where older version of the python s installed.
