Install python 2 and 3 on mac

In particular, you should always install Setuptools, as it makes it much easier for you to install and manage other third-party Python libraries.

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The version shipped with OS X may be out of date from the official current Python release , which is considered the stable production version. The fastest way is to install the Xcode Command Line Tools by running xcode-select --install. In combination, the software can cause issues that are difficult to diagnose. If you perform a fresh install of Xcode, you will also need to add the commandline tools by running xcode-select --install on the terminal.

The right and wrong way to set up Python 3 on MacOS

While OS X comes with a large number of Unix utilities, those familiar with Linux systems will notice one key component missing: a decent package manager. Homebrew fills this void. So when should you use version 2 and when should you use the latest release, 3. The Python. Firstly, if you're deploying to an environment you don't control, that may impose a specific version, rather than allowing you a free selection from the available versions. Secondly, if you want to use a specific third party package or utility that doesn't yet have a released version that is compatible with Python 3, and porting that package is a non-trivial task, you may choose to use Python 2 in order to retain access to that package.

It's particularly easy to do because 1 There's an OS X installer package that does all the work and 2 You can still run both versions, so there's no penalty to installing 3. Go to the Python website's download page.

Upgrading and Using Python 3 on a Mac

It should auto-detect that you're on a Mac and offer you some options. You're probably wanting 3. The interesting part of the page will look something like this:. You'll be downloading an OS X. The When you double-click it, it will mount on your desktop as a volume.

Open the DMG, and you'll see this:. It's important that you read the file " ReadMe.

Install Python 2 on Mac

Entering python3 in bash will call python 3. If that was confusing compare the order that the python paths are added to my bash profile below to the PATH listed above. If you want to keep all of your installed versions of python, but want bash to open a different version first, just copy and paste it to the bottom of the bash profile. You also have to reload the bash profile in bash before any changes take effect. Just enter one of the following commands:.

The asterisk indicates that the system version of python is active, but 3. Create a folder called PythonLocalProject , then display the version of python called by bash by entering python -V :.

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  6. The right and wrong way to set up Python 3 on MacOS?

This creates a. This procedure is fine, you can set a version of python to run in a particular folder.

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But what if you want to use pyenv to set a global version of python. If you navigate back to the PythonLocalProject folder with the.

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  • We can use the which command to identify where specific versions of python are located:. The locations of the anaconda and miniconda versions of python are self explanatory, so are the pyenv installs, the python.

    Installing Python 2 on Mac OS X — The Hitchhiker's Guide to Python

    To delete all versions of python that were installed using the python. To remove particular versions of python, you have to refer to the particular framework. So for example if you wanted to uninstall only version 3. To uninstall python that was installed using homebrew you need to identify what versions of python have been installed by Homebrew:. Currently brew refers to python3 as python and python 2 is called python 2.

    Homebrew will refuse to uninstall python if it has dependencies, just uninstall python and ignore the dependencies:.