How to install WEB3 correctly?

Question

linux

I want to make a reservation, I'm new to Unix like this, but I'm developing.
The target system on which Linux Mint.19.x64 is installed.
The goal is to install WEB3.
Link to the repository https://github.com/ethereum/web3.py/blob/master/do...
As far as I understand, based on searches on the forums, the product from the repository only works with python v 3+. Maybe I'm wrong.
Where I started by executing the following commands

sudo add-apt-repository ppa:jonathonf/python-3.6
sudo apt-get update
sudo apt-get install python3.6

Installing WEB3 is possible as far as I understand through PIP by running
pip install web3
Here it seemed to me that my dancing with a tambourine would end, but no.
I get that there is no pip and setuptools.
I install

sudo apt-get install python3-setuptools
sudo apt install python3-pip
pip install web3

Still does not work
I do what is provided by the developer of the repository

sudo apt-get install python3-venv
sudo apt-get install python3-dev
git clone https://github.com/ethereum/web3.py.git
cd web3.py
python3 -m venv venv
. venv/bin/activate

And at this step
pip install -e .[dev] (does not work at least, at the maximum I don’t know what it is at all)
The essence of the question is to tell how to install WEB3 through PIP or something else.

Answer 1

on ubuntu everything came together there is a suspicion of ppa
sudo add-apt-repository ppa:jonathonf/python-3.6
sudo apt-get update
sudo apt-get install python3.6
try or install without ppa or change system

Answer 2

If Python 3, then you most likely need to use and pip3instead ofpip