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side comment, mind the top comment of the file:
WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again. Do not edit this file unless you know what you are doing.
modifying the generated file is not the way of working.
Please refer to https://doc.qt.io/qtforpython/tutorials/basictutorial/uifiles.html#option-a-generating-a-python-class