Having two "colon" marks in "environment.yml" file raises error.

[MHVali]

When creating virtual environment, in the "environment.yml" file, there are two "colon" marks for installing "pytorch" and "torchvision" packages, which raises the error of "ResolvePackageNotFound: - pytorch::pytorch=1.3".

In order not to get this error, you have to remove one colon mark (:) to install "pytorch" and "torchvision" packages.

[MHVali]

Another problem I found is that there is no "matplotlib" package in the "environment.yml" file. So, it raises an error when running "interactive.py".