Now that Python 3 is installed through pyenv, we want to set it as our global default version for pyenv environments: $ pyenv global 3.7.3ģ.7.3 (set by /Users/mbbroberg/.pyenv/version) Python-build: use openssl 1.0 from homebrew Now let's install the latest Python version (3.7.3 as of this writing): $ pyenv install 3.7.3 While other installation options are available, the easiest way to get started is with Homebrew: $ brew install pyenv This tool manages multiple versions of Python and is described as 'simple, unobtrusive, and follows the Unix tradition of single-purpose tools that do one thing well.' How do we stop caring about the default? Moshe recommends using pyenv to manage Python environments (for a deeper dive on configuring pyenv, see this article).

You do not want the Mac OS X 'default Python' to be 'python3.' You want to never care about default Python.' 'The basic premise of all Python development is to never use the system Python. He helped 40 colleagues develop Python safely and consistently on macOS systems following one core principle:

I knew Moshe was familiar with Python, but what I didn't know is that he is an author of many Python tutorials as well as an upcoming book on Python development on macOS. Moshe Zadka cautions that doing this wrong could result in an unreliable idea of which Python is running that depends too closely on shells loading aliases. Here's the full story of how to set up your environment without breaking anything built into the macOS operating system. To my surprise, I found only a handful of StackOverflow posts, and they pointed me to partial solutions. So, I did what any of us would do and googled around looking for a guide to update my development environment, which runs on Mac (the macOS operating system, formerly known as OS X). A future version of pip will drop support for Python 2.7. Please upgrade your Python as Python 2.7 won't be maintained after that date. $ pip install todoist-pythonĭEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. (If you're headed there as well and want to share your Python story, let me know!) When I installed a module to tinker around with, I got a reminder that I needed to install Python 3 soon. I've been dipping my toe back into Python development as I get ready to head to P圜on US.

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