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We recommend you explicitly refer to python3 or python2.

For details on how to revert the changes or do the setup interactively, see man unversioned-python. That’s why you can use the alternatives mechanism to enable the unversioned python command system-wide, and set it to a specific version: alternatives -set python /usr/bin/python3įor Python 2, use /usr/bin/python2 instead. That said, there are applications that expect a python command to exist and that assumption might be hard to change. By making python always mean Python 2, Red Hat would be painting itself into a corner. However, we expect that this viewpoint will become much less popular over the lifespan of RHEL 8. This side is also backed by an official upstream recommendation, PEP 394. Today, in 2018, the python = python2 side is more popular, even among those that prefer Python 3 (which they spell out as python3). The two don't always talk to each other, so you might be a member of one camp and not know anyone from the other – but they do exist. One expects python to mean Python 2, and the other Python 3. Why? Frankly, we couldn’t agree what python should do.

But what if I use just python? Well… $ python Okay, okay, so there's python3 and python2. Get it using yum install python2, and run with python2. And that’s OK! RHEL 8 still contains the Python 2 stack, which can be installed in parallel with Python 3. Not all existing software is ready to run on Python 3. Use yum install python3-requests to install the popular library for making HTTP connections. Similarly to any other available tool, use yum install python3 to get it.Īdd-on package names generally have the python3 prefix. In RHEL 8, Python 3.6 is the default, fully supported version of Python. If that doesn't work for you, or you need more details, read on! Python 3 To install Python, type yum install python3. But Python 2 remains available in RHEL 8.

In Red Hat Enterprise Linux 8, Python 3.6 is the default. Still, in the last decade, the vast majority of community projects has migrated to the new version, and major projects are now dropping support for Python 2. They initially underestimated the impact of the changes, and the popularity of the language. Ten years ago, the developers of the Python programming language decided to clean things up and release a backwards-incompatible version, Python 3.