how to change python version in ubuntu 20 04

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in ubuntu 20.04, you may encounter scenarios where you need to switch between different versions of python, perhaps due to compatibility issues with certain libraries or projects. this tutorial will guide you through the process of changing the python version on your ubuntu 20.04 system.
first, let's check which python versions are currently installed on your system. open a terminal and type:
this command will list all python executables available on your system.
if the python version you want to switch to is not installed, you can install it using the package manager apt. for example, to install python 3.8, you can use:
replace python3.8 with the version you want to install.
ubuntu 20.04 uses update-alternatives to manage different software versions. we will use it to select the default python version.
this command will display a list of installed python versions and their paths, like this:
to change the default python version, simply type the number corresponding to the version you want to use and press enter.
to ensure that the change has taken effect, you can verify the default python version by running:
this command will display the currently selected python version.
after changing the python version, you may also want to update pip to ensure compatibility with the selected python version:
this command will upgrade pip to the latest version for the selected python interpreter.
that's it! you have successfully changed the python version on your ubuntu 20.04 system. remember to update any virtual environments or project configurations accordingly to match the new python version.
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