However the following packages replace it: python3-pip

[hktalent]

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

[hktalent]

change to:
sudo apt-get install python3-pip python3-virtualenv python3-dev libfreetype6-dev
screen g++ python-tk unzip libsnappy-dev cmake -y

is ok