How to install Python 3 and PIP 3 on Ubuntu 20.04 LTS – Linux Shout – H2S Media

If you want to get started with the latest version of Python3.x on Ubuntu 20.04 LTS, then here is the tutorial along with the installation of PIP3 and its usage to install various Pythons Packages.

If you have just started taking interest in coding and software development then you would already know Python. It is an open-source and free to use programming language that has been used to develop hundreds of software projects. Python is platform-independent language thus can run on all mainstream operating systems such as Windows, Linux / Unix, Mac OS X, Solaris more

Python has been very popular among the developers because of its powerful range of functions and libraries with only a few keywords and the reduced grammatical syntax and the resulting clarity.With Python, you can not only write your own programs but also can integrate scripting language in other applications furthermore building AI models is another usage of Python.

What we learn:

What do we need to perform this tutorial?

Open the command terminal, for GUI Desktop use Applications or the keyboard shortcut CTRL+ALT+T on Ubuntu. And run the system update command, so that our existing repos and packages can be updated.

The good thing is to install python on Ubuntu, we dont need to add any third-party repository. The programming language is available by default on the official repo. Thus, what we have to do is the running of the command with the version you want to download and install on Ubuntu 20.04 LTS focal fossa.

For Python 3.x:

The latest version in our case for Python was python 3.8.6.

For Python 2.x:

In case also want the older version, then use this command; it will download python2.7 for you.

If we go through the tutorial then you would havetwo different Python on the same system. Thus, the command to call the interpreter will also be different.

To check the version of Python 3.x, the command will be:

And for Python2.x

And for default:

By default, the command python will be associated with version 2.x and will only call that whereas python3 for version3.x. Therefore, if you are fine with that then skip this step. However, those want to use python3 with python command instead of using its version repeatedly, then use the below procedure.

First, check the default version:

The output will be version will be 2.7.x

Python 2.7.18rc1

Now, see all the installed versions of Python on your system:

In our case, the output was:

So, you can see the two versions that are available to the user- 2.7 and 3.8. In the same way, you would have on your command terminal.

Now, we set one of them as the default Python versions for Ubuntus current user. Well, by default, it was 2.7, thus we are changing it to 3.8 here.

In the same, replace 3.8 in the above command with the one, want to use by default for your current user.

Now, log out and log in again or simply source the bash file:

Finally, check the default version:

This time it will be 3.8 or whatever you have set.

Well, in most of the cases after install python you will get the PIP that is the packages installer for Python. Thus, in case you dont have then get the PIP for Pthong on Ubuntu manually:

Just the Python, pip3 is not the default version that we can use with only pip command. Thus, we can also change that simply using

alias pip=pip3

Therefore, to call the other pip version you need to given the version along with it. However, after using the above command the default pip will work for the pip3 version.

In future to upgrade the pip, use the command:

syntax: pip install packages-name

Now, lets use the pip to install some Python-based libraries such as Numpy

In case you get a warning:

WARNING: The scripts f2py, f2py3 and f2py3.8 are install in /home/user/.local/bin which is not on PATH.

Consider adding this directory to PATH or, if you prefer to suppress this warning, use no-warn-script-location.

This appears because the PIP installed location is not available in the PATH thus add it:

So, this was the quick tutorial on the Python 3.x and Pip3 installation on Ubuntu 20.04 LTS

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How to install Python 3 and PIP 3 on Ubuntu 20.04 LTS - Linux Shout - H2S Media