Ubuntu 20.04 mínimo: "no se puede encontrar el paquete python-pip"

El paquete se llama python3-pip. Python 2.7 no se entregan ya con Ubuntu 20.04, casi todos python relacionados con los paquetes se llama python3-*.

Para obtener el Python 2 versión de pip de nuevo, puede utilizar get-pip, que es un único script que descarga e instala la última versión de pip (para Python 2 o 3, independientemente de la versión de ejecutar el script):

$ curl -O https://raw.githubusercontent.com/pypa/get-pip/master/get-pip.py
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1824k  100 1824k    0     0  2211k      0 --:--:-- --:--:-- --:--:-- 2211k

$ python get-pip.py 
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Defaulting to user installation because normal site-packages is not writeable
Collecting pip
  Using cached pip-20.1-py2.py3-none-any.whl (1.5 MB)
Installing collected packages: pip
  Attempting uninstall: pip
    Found existing installation: pip 20.1
    Uninstalling pip-20.1:
      Successfully uninstalled pip-20.1
  WARNING: The scripts pip, pip2 and pip2.7 are installed in '~/.local/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-20.1

A continuación, agregue ~/.local/bin/ a la PATHde acceso (por ejemplo, en su ~/.bashrc):

PATH=$HOME/.local/bin/:$PATH

Después de que usted debe tener un trabajo pip de comandos de Python 2. O uso pip2 / pip2.7 si desea asegurarse de que usted no está de orientación de Python 3.