Install Python on Ubuntu

[Gulshan Negi]

I am trying to install Python 3.9 on my Ubuntu OS, I try to install Python in the following manner
sudo apt-get install python3.9
after seems installed I tried checking the version:
python -V
However, this input returns:
-bash: python: command not found
It seems like Python versions don't fully install.
Can anyone help me for installation Python on Ubuntu?

[JonB]

@Gulshan-Negi
It certainly used to be the case that under Ubuntu/Linux generally python attempts to run Python 2.x. To run Python 3.x you are/were supposed to type python3?

[Gulshan Negi]

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[JonB]

@Gulshan-Negi
I don't really know why you needed to do anything. Ubuntu 20.04+ comes with Python 3 already installed....

[SGaist]

Currently python is by default python2. To ensure you are getting the Python 3 interpreter call python3.

As for having different versions of python on your system, I would recommend using either virtualenv or conda to manage them rather than system installation. This will allow you to work in isolated environments tailored to the needs of your projects.

[Westley Martin]

To run Python 3.x you are/were supposed to type python3

[Kent-Dorfman]

alternatives is a front end for simply replacing the /usr/bin symlinks. You can make /usr/bin/python point to whatever version you have installed. I'm in upgrade to python3 hell at the moment because I installed debian 11 on my newest workstation and I need to make it backward compatible with bunches of NFS shared python2 programs I run interchangably on other machines. of course many of those apps use python2 specific modules that aren't available in debian11.

[woky]

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[claudiajohnston]

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[jsulm]

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