Python is now deprecated

[PrydeP]

Can the installation instructions be updated to Python3? When running the commands as is, the installation fails as Python2 has been deprecated.

Package python-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  python2-dev python2 python-dev-is-python3

Package python is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  python2-minimal python2 dh-python 2to3 python-is-python3

Package python-mysqldb is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python' has no installation candidate
E: Package 'python-dev' has no installation candidate
E: Package 'python-mysqldb' has no installation candidate

[R8ghid]

As much as I would love to troubleshoot every error, there is a lot that needs to be adjusted as this doesn't work the way it is with the playbook provided in the course.