~2 min read|
I recently had to run an application built with Python 3.6. Unfortunately, when I looked at the installed version of python on my OS, it was 2.7
$ python --version Python 2.7.17
In Node-land, this is where something like
nvm comes in handy for having different versions of node installed to easily move between them based on the project requirements.
(Side note: I got sick of using the wrong version to build my node projects, so I now check for a
.nvmrc file every time I change directories.)
It turns out Python has a very similar tool called
pyenv (and Ruby does too -
Chris J Mendez has a great write-up on how use it to install multiple versions of python which was the main reference document I used to get up to speed.
The basic steps (using Homebrew) as Chris outlines them:
$ brew update
$ brew install pyenv
If you want
pyenv to run every time you boot up your terminal, you can add it to your
bash_profile like so:
$ echo 'eval "$(pyenv init -)"' >> ~/.bash_profile
Alternatively, you can add it as an alias:
$ alias runpyenv='eval "\$(pyenv init -)"'
To have these changes take effect, you’ll need to refresh your terminal.
$ source ~/.bash_profile
pyenv to install the version you need
List available versions
$ pyenv install --list
Install the desired version
$ pyenv install 3.8.0
Set your version of python
Review which versions are installed
$ pyenv versions
$ pyenv local 3.8.0
$ pyenv global 2.7.0
$ python --version
You may need to reload your terminal again to see the changes take effect.
Hi there and thanks for reading! My name's Stephen. I live in Chicago with my wife, Kate, and dog, Finn. Want more? See about and get in touch!