Reading package lists... Done
+ sudo apt-get install python-pip python-virtualenv python-dev libfreetype6-dev screen g++ python-tk unzip libsnappy-dev cmake -y
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'python-dev-is-python2' instead of 'python-dev'
Package python-pip 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:
python3-pip
Package python-virtualenv 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-pip' has no installation candidate
E: Package 'python-virtualenv' has no installation candidate
Note, selecting 'python-dev-is-python2' instead of 'python-dev'
Package python-virtualenv 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-virtualenv' has no installation candidate