How to install python3-pip, under Ubuntu how to use the python3? that comes with the system

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there is a python3 by default on the machine, but when you install pip3, you install another python3, because you only write scripts in python, so you don"t need extra python,. How can you avoid this problem again?

Python3.x python ubuntu

Mar.11,2021

use the virtual environment virtualenv.

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