SHELL

install pip3

sudo apt install python3-pip

install pip3.9

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3.9 get-pip.py

install pip3

Installation
Step 1 - Update system
$$$ sudo apt-get update

Step 2 - Install pip3
$$$ sudo apt-get -y install python3-pip

Step 3 - Verification
$$$ pip3 --version

how to install python-pip3

 sudo apt install python3-pip

install pip3 for python 3.7

sudo apt install python3-pip