AttributeError: module 'pylab' has no attribute 'ioff' (Python 3.9)

[MartinParidon]

Under Python 3.7, this appeared to work, in Python 3.9, I can only get it to work when I change

import pylab as pl
to
import matplotlib.pyplot as pl

Can this be changed?

[fabianp]

pull requests welcomed

[andriy-pc]

reinstalling psutil module helped me