If you are using a different Linux distribution, replace the apt command with the appropriate command featured for your package manager. Warning : Many Linux systems have Python 2 installed as the system version.
Removing Python 2 could cause a system error. If you are planning to install Python 3 on Linux, install it alongside Python 2 and invoke it with the python3 command. However, checking the installation with the python3 --version command still returns the old version.
To fix this, you need to create a list of update alternatives. First, add the old version to the list with the command:. The output displays the available choices and their assigned number in the example below, the numbers are 0 , 1 , 2.
Type the number of the the version you wish to use and press Enter. If you are not planning to use the old version of Python, remove the symlink that contained the previous Python 3 version with:.
Since Python 3 was not a backward-compatible release, for a long time Python 2 remained the version of choice for those who wanted a stable development environment. Some services like Google App Engine did not support Python 3 for a long time. However, given that the official support for the final Python 2.
Python 3 is faster, and its syntax is more user-friendly. If you already work with Python 3, upgrading to the latest point release gives you all the security updates and bug fixes. After reading this tutorial, you should know how to upgrade your Python 3 version on Windows, macOS, and Linux. If you want to learn more about Python, read our article on Python data types. How to Upgrade Python to 3. Introduction Every fresh Python release comes with bug fixes and new features. So, again, installing the newer version is the only upgrade step needed.
If a package matching the requested name and version is not already installed in a directory on sys. Uninstalling Packages If you have replaced a package with another version, then you can just delete the package s you don't need by deleting the PackageName-versioninfo.
After you've done this, you can safely delete the. However, if your deployment is located in a virtual environment, you should use the Pipenv package manager to update all Python packages. NOTE: be aware that upgrading packages can break your environment by installing incompatible dependencies.
This is because pip and pipenv do not resolve dependencies, unlike the ActiveState Platform. In general, you can use the following steps to perform a package upgrade:. Depending on your operating system or virtual environment, refer to the following sections.
The easiest way to update all packages in a Windows environment is to use pip in conjunction with Windows PowerShell:. Linux provides a number of ways to use pip in order to upgrade Python packages, including grep and awk. To upgrade all packages using pip with grep on Ubuntu Linux:. To upgrade all packages using pip with awk on Ubuntu Linux:. Pip can be used to upgrade all packages on either Windows or Linux:.
The easiest way to update unpinned packages i. The simplest way to update all the unpinned packages in a specific virtual environment created with pipenv is to do the following steps:. The ActiveState Platform is a cloud-based build automation and dependency management tool for Python. It provides dependency resolution for:. The ActiveState Platform is the only Python package management solution that not only resolves dependencies but also provides workarounds for dependency conflicts.
Simply following the instruction prompts will resolve the conflict, eliminating dependency hell. You can try the ActiveState Platform for free by creating an account using your email or your GitHub credentials.
Start by creating a new Python project, pick the latest version that applies to your project, your OS and start to add packages. Or start by simply importing your requirements.
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