Linux systems are built for programming, thus most of
Linux distribution (such as Ubuntu, CentOS, etc.) come with Python by default.
Some Linux distributions even come with two version of Python. For instance,
the latest version of Ubuntu comes with Python 2.x and Python 3.x.
1. Open the terminal which built in the Linux distribution
therefore key in “Python” to detect whether Python has installed and what is the
installed version of Python.
2. You can see the Python version which indicates that the current
Linux distribution comes with Python version. The Python command prompt >>> indicates we
have entered the Python interactive programming environment.
3. Key in “exit()” to exit the Python programming environment and
return to the Linux command line. Majority of Linux distributions come with Python 2.x
instead of Python 3.x. Key in “Python3” in the Terminal to check the current Python
version in the Linux distribution.
If the Python3 command runs successfully and symbol >>> appears on the
Python prompt, it indicates that the current Linux distribution has installed the Python 3
development environment. Thus, you can start to use Python3.
However, if current Linux does not install Python 3, or you feel that the
existing Python 3 version is not the latest version, you can update the Python version. For
this case, we use Ubuntu as an example.
How to update Python version on Ubuntu (With pictures)
1. Update the Python version by executing the following two commands in
$sudo apt-get update
$sudo apt-get install python3.8
Explanation of two commands:
The first command: used to update the source addresses listed in /etc/apt/sources.list
and etc/apt/sources.list.d, it can help to ensure that the latest installation package is obtained.
The second command: used to specify the version of Python that you would like to update to.
Wait for the execution of the above two commands and enter the Python3 command in the terminal
again. You can see the Python interactive programming environment has been updated to Python 3.8.
If you do not have Python environment in Ubuntu or you want to reinstall, then you can follow
1. Download the source code from the official website.
Python official address: https://www.python.org/downloads/
You can see various versions of Python after clicking on the link.
2. Look for the Python version that you want to install then download it.
3. Click either the Python version number or “Download” button in the figure
below in order to enter the download page. Therefore, scroll to the end of the page to look for
Python installation packages for each platform.
4. Right-click on the “Gzipped source tarball” and select “Copy link address” from
the pop-up menu in order to get the source code archive address in .tgz format.