Virtual Environments

https://www.integralist.co.uk/posts/python-management/
Poetry - dependency management and package management too. Better than pipenv.

Having different dependencies management for DEV, PROD envs.
combines requirements.txt, setup.cfg, MANIFEST.ini.
Includes all best practices of project configuration.

Pipenv is a packaging tool for Python that solves some common problems associated with the typical workflow using pip, virtualenv, and the good old requirements.txt. Pipenv is slower than poetry.

Add to PATH

export PATH=$PATH:~/opt/bin:~/dev/bin
echo $PATH

Poetry

pyproject.toml is very important thing here. poetry.lock is helper that locks the versions of dependencies.

pip install poetry

poetry --version
poetry --help
poetry list
poetry self update # To update poetry


# To create a project OR to initialize the existing project
poetry new new_project
poetry init

# To get info about environement, you can change Python version from here too
poetry env info

# instead of pip install -r requirements.txt AND updating
poetry install # poetry lock - will not install, just will create a lock file
poetry update

# Alternative of "pip freeze"
poetry show --tree

# To add new dependency 
poetry add "pygame>=2"

# To run the code
poetry shell # Then "python main.py"
# OR
poetry run python main.py

# To exit the venv
exit 
deactivate

# To config Poetry
poetry config --list

# pre-commit hook
poetry check 

# Search for libraries
poetry search requests pendulum

poetry cache list
poetry cache clear

# JFROG
poetry source show

poetry.lock file prevents you from automatically getting the latest versions of your dependencies, everyone in the project will have the same versions. To update, you can use poetry update command. This will fetch the latest matching versions (according to your pyproject.toml file) and update the lock file with the new versions. (This is equivalent to deleting the poetry.lock file and running installagain.)

Add to PATH

Poetry

Resources