How to install pip?

Hi I am trying to install the pip and I get the following error:
root@mail:~/kopano_spam/inotify-spamlearn-master# sudo apt install python-pip3
Reading package lists… Done
Building dependency tree
Reading state information… Done
N: Ignoring file ‘20_ucs-online-component.list.old’ in directory ‘/etc/apt/sources.list.d/’ as it has an invalid filename extension
E: Unable to locate package python-pip3

Any idea how to resolve it?
Thank you

The package is called python3-pip. :wink:

thank you though I still get an error:
a# apt install python3-pip
Reading package lists… Done
Building dependency tree
Reading state information… Done
Package python3-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

E: Package ‘python3-pip’ has no installation candidate

ucr set repository/online/unmaintained=yes

apt-get update

z.b.
apt-get install python3-pip

Thank you that works great.
Should I do:
ucr set repository/online/unmaintained=no

After?

Theres no need to disable it again, if you do , you will not be able to update packages from that repo

Best Reguards
pider