Manage Python versions with pyenv

Fri, 25 Mar 2022 16:00:45 +0100

With pyenv you can easily switch between python versions. When working on multiple project is recommended to create a .python-version file containing the targeted node version. Here is how.

First make sure the right python version is installed.

➜  example-project git:(main) python --version
Python 3.7.8
➜  example-project git:(main) pyenv install 3.8.6
Installing Python-3.8.6...
Installed Python-3.8.6 to /home/janikvonrotz/.pyenv/versions/3.8.6

Use the new version locally.

➜  example-project git:(main) pyenv local 3.8.6
➜  example-project git:(main) ✗ cat .python-version
3.8.6

Of course you can set the new version globally using pyenv global x.x.x.

Switch between folders to check if the correct version is loaded automatically.

➜  ~ python --version 
Python 3.7.8
➜  example-project git:(main) ✗ python --version
Python 3.8.6

Here is an overview of the python version is selected when working with pyenv.

You can reset the global version by setting system as python version.

➜  ~ echo system > ~/.pyenv/version

Create and use nvm rc file

Thu, 17 Mar 2022 16:44:45 +0100

With nvm you can easily switch between node versions. When working on multiple project is recommended to create a .nvmrc file containing the targeted node version. Here is how.

First make sure node is on the right version.

➜  example-project git:(main) node -v
v12.22.6
➜  example-project git:(main) nvm use 14
Now using node v14.18.3 (npm v6.14.15)
➜  example-project git:(main) node -v
v14.18.3

Pipe the version into the .nvmrc file.

➜  example-project git:(main) node -v > .nvmrc

Then assume you switch to another version.

➜  example-project git:(main) ✗ nvm use 12
Now using node v12.22.6 (npm v6.14.15)
➜  example-project git:(main) ✗ cat .nvmrc
v14.18.3

In the project type nvm use and it will automatically load the version in the .nvmrc file.

➜  example-project git:(main) ✗ nvm use
Found '/home/janikvonrotz/jaiunedemande/.nvmrc' with version <v14.18.3>
Now using node v14.18.3 (npm v6.14.15)

Repeat this process for all projects.

Version-Management on Janik von Rotz

Manage Python versions with pyenv

Create and use nvm rc file