Python package manager comparison

• This is a slide for LT performed at the company booth of Pycon 2020.

Self-introduction

--Shota Yamamoto --VisasQ Advisor Development Team --Front end center

Introduction

--Python doesn't have clear de facto standard tools like npm, bundler --Most tools use pip internally ――Select in consideration of what you want to do and development speed

Thing you want to do

--Fixed version including child dependency --Package upgrade --Simple script registration

Don't talk

--Building packages, publishing to PyPI, etc.

• setup.cfg, wheel --Assuming an application that will not be published as a library

Tools to introduce

• pip-tools
• pipenv
• poetry

Tools not to talk about this time

• anaconda --Mainly used when building an environment for machine learning --Not suitable for use in web application development
• flit
• Pyflow

pip-tools

version control

• requirements.in, requirements.txt --It can be separated from the dev package by preparing dev-requirements.in etc. --Generate requirements.txt with pip-compile requirements.in --Install with pip-sync

Version upgrade

--Packages can be updated individually

• pip-compile --upgrade-package django

Register a simple script

--None

pipenv

version control

• Pipfile, Pipfile.lock --Can be described separately from the dev package

https://pipenv-ja.readthedocs.io/ja/translate-ja/basics.html

[[source]]
url = "https://pypi.python.org/simple"
verify_ssl = true
name = "pypi"

[packages]
requests = "*"


[dev-packages]
pytest = "*"

Version upgrade

--Update all packages at once --Packets cannot be updated individually --Update all packages during install --Do not exceed the version described in Pipfile

Register a simple script

--Write in scripts of Pipfile --Run with pipenv run foo

[scripts]
lint = "flake8"

Other

--There was a time when it wasn't released for about a year and a half --Released in April of this year and several times since: ideograph_advantage:

• https://pypi.org/project/pipenv/#history

poetry

version control

• pyproject.toml, poetry.lock --Can be described separately from the dev package

https://github.com/python-poetry/poetry

[tool.poetry.dependencies]
requests = { version = "^2.13", extras = [ "security" ] }

[tool.poetry.scripts]
my-script = 'my_package:main'

Version upgrade

--Packages can be updated individually --Need to update individually until child dependency

Register a simple script

--There is a function to prepare * .py and execute it. --You cannot write commands directly ――It's not easy because you need to prepare a file each time. --Convenient for doing complicated things

Other

--There are few maintainers and the development speed is slow

Summary

• pipenv ――Recently, the number of releases has increased and is it becoming more active again?
• poetry ――Personally the easiest to use ――It takes time, but if you send a pull request, it will be taken in properly
  • Add error handling for malfoemed author