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Please read and follow the issue template. the command you ask is inside it.
Also there is a thread on the forum for installation problems.
I am curious about this too. Given a statement like found in this course: https://github.com/fastai/fastai/blob/master/courses/dl2/pascal-multi.ipynb how can you find what version you do have installed?
As the issue template states:
from fastai.utils.show_install import *
show_install()
You can also
import fastai
fastai.__version__
Most helpful comment
As the issue template states:
You can also