![]() This means that it is not easy to use them to install multiple python versions globally for all users. This disadvantage is that, by default, they are installed at the user-level (inside your home directory) and require a little bit of user-level configuration - you'll need to edit your ~/.profile and ~/.bashrc or similar files. They also provide commands for easily changing the available python version(s) using shims and setting the python version per-directory. The advantages to these package managers is that it may be easier to set them up and install multiple versions of python with them than it is to install python from source. asdf - able to install and manage many different languages.pyenv - only able to install and manage versions of python.Pip X.X.X from /usr/local/lib/pythonX.X/site-packages (python X.X)įor a package manager that can install and manage multiple versions of python, these are good choices: # Pip is now available for this version as well: You can test the new version: $ pythonX.X -V Your new Python bin is now located in /usr/local/bin. (replace the 'x's with your downloaded version) $ sudo tar xzf Python-x.x.x.tgz ![]() $ sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-devĭownload and extract desired Python versionĭownload Python Source for Linux as tarball and move it to /usr/src.Įxtract the downloaded package in place. $ sudo apt-get install build-essential checkinstall Install Required Packages for source compilation If you need to install multiple versions of Python (next to the main one) on a Unix system: # If you want to define the local (project) version: # If you want to define the global version: # Install the Python interpreters that you need: # List all available Python interpreters: If you have asdf installed you can easily download/install new Python interpreters: # Install Python plugin for asdf: Note2: asdf works fine in combination with popular package-managers such as pipenv and poetry. Note1: asdf works not only for Python but for all major languages. These days I suggest using asdf to install various versions of Python interpreters next to each other. The primary version, you would execute "make install" in your 2.6 buildĭirectory and "make altinstall" in the others. Install all other versions using "make altinstall".įor example, if you want to install Python 2.5, 2.6 and 3.0 with 2.6 being Version (if any) is your "primary" version. To install multiple versions using the same prefix you must decide which All files andĭirectories installed using "make altinstall" contain the major and minor Overwritten by the installation of a different version. Script) you must take care that your primary python executable is not Using the same installation prefix (-prefix argument to the configure On Unix and Mac systems if you intend to install multiple versions of Python If you want to compile the versions manually, this is from the readme file of the Python source code: Link /usr/bin/python to the one you want to use as default.Īll the libraries are in separate folders (named after the version) anyway. usr/bin/python2.5 and /usr/bin/python2.6. Just install them, then you have the commands e.g. To make python command to point to python3, install python-is-python3 package by running sudo apt install python-is-python3 command in terminal.I think it is totally independent. Multiverse - Software restricted by copyright or legal issues. Restricted - Proprietary drivers for devices. Universe - Community-maintained free and open-source software. The four main repositories are: Main - Canonical-supported free and open-source software. Python 2 has now been moved to from main repository to universe repository. The reason they did this was because python2 itself has reached EOL (end of life). Where as python and python2 will refer python2. To check info about python3, you will have to use python3 -version or something which starts with python3 explicitly. However if you have also installed python 2 (on your own, it is not preinstalled), then you can use python2 -version or python -version to check the version of python2. At this moment if you run python3 -version, you will see version 3.8.2 is installed. Only python3 (v3.8.2 in 20.04) is preinstalled. Since Ubuntu 18.04 LTS, things have changed. Up until Ubuntu 18.04 LTS, both python2 and python3 were preinstalled on Ubuntu.
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