pyenv cheat sheet

pyenv_cheat-sheet.txt

# Pyenv cheat sheet

"pyenv" allows you to install and manage different versions of python on the same machine
"pyenv virtualenv" allows you to have and manage different package install environments


brew install pyenv pyenv-virtualenv

https://realpython.com/intro-to-pyenv

### List installed python versions
pyenv versions


### Set and show active global version
pyenv global 3.10.11
pyenv global


### Set and show a locally active version
### This creates a .python-version file in the directory the command was run from
### The local version persists for subdirectories
pyenv local 3.11.3
pyenv local


### Show how pyenv is deciding on the version to use 
pyenv versions


### You can explicitely override whatever version gets set with env variable
PYENV_VERSION=3.10.11


### Create a virtualenv
pyenv virtualenv 3.10.11 my_env


### Activate the virtual environment in the current working dir
### Creates a .python-version file with the environment name 
### rather than the python version name
pyenv local my_env
pyenv local


### Show versions and environments, and current activated one
pyenv versions


### Explicitly set the environment or override the local one
pyenv activate my_env


### Deactivate it
pyenv deactivate

### Run script using environment rather than path
#!/usr/bin/env python