One would think that installing Python for you favorite package manager would solve issue of missing PIP. But you are one step before achieving it.
# Advanced Package Tool (Python 2.x)
apt-get install python-pip
# Advanced Package Tool (Python 3.x)
apt-get install python3-pip
# pacman Package Manager (Python 2.x)
pacman -S python2-pip
# pacman Package Manager (Python 3.x)
pacman -S python-pip
# Yum Package Manager (Python 2.x)
yum upgrade python-setuptools
yum install python-pip python-wheel
# Yum Package Manager (Python 3.x)
yum install python3 python3-wheel
# Dandified Yum (Python 2.x)
dnf upgrade python-setuptools
dnf install python-pip python-wheel
# Dandified Yum (Python 3.x)
dnf install python3 python3-wheel
# Zypper Package Manager (Python 2.x)
zypper install python-pip python-setuptools python-wheel
# Zypper Package Manager (Python 3.x)
zypper install python3-pip python3-setuptools python3-wheel