How to install Python 3

Question

I’m new to Ubuntu and I’m learning Python.

I have installed on my pc Pyhton 2.7.12 and would like to know how I do to upgrade to version 3.

I’m taking a course where I need to use a lib.

import urllib.request

But the following error appears:

import urllib.request
ImportError: No module named request

Looking at the internet I saw some comments saying that for this to work I needed to run the file with python 3 installed.

I would like to know how to install python 3 to fix this error.

Answer 1

In Ubuntu one of the ways to install any package is to use apt-get:

sudo apt-get install <nome do pacote>

If you do not know the package name uses:

apt-cache search <nome do pacote>

In the case of python3 would stay:

sudo apt-get install python3

To check the installation:

 python3 --version

To use python3:

python3 arquivo.py

I hope I’ve helped ^^