Update imapbackup38.py to python3 codestyle#48

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mmachicao wants to merge 2 commits intorcarmo:masterfrom mmachicao:python3_codestyle

+350-272

Commits on Nov 20, 2023

added setup.py for installing imapbackup38.py
mmachicao
committed

Commits on Nov 21, 2023

applied python3 and pylint styleguide
mmachicao
committed