sagemath package cannot install; requires python3-pip
When installing the sagemath package (mathematics software) from the repositories, the following error is given:
$ sudo apt install sagemath
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
python3-virtualenv : Depends: python3-pip (>= 20.1-1~) but it is not installable
Depends: python3-pip-whl but it is not installable
E: Unable to correct problems, you have held broken packages.
Since the sagemath package depends on pip, which is not in the repositories, it is not possible to install this software.
I have the backports repository enabled and I am using the fsf.org mirror for my repositories, if it helps.