Alexander Hultnér
Founder, Hultnér Technologies (https://hultner.sehttps://hultner.sehttps://hultner.se Want me to speak at your company? Corporate training? Or just a fresh pair of eyes on your project? Contact me for contracts.
Unpack Python Packages 📦
Deep dive into the wheels of python packaging
Alexander Hultnér FlaskCon, 2021
@ahultner
Alexander Hultnér
Founder of Hultnér Technologies and Papero.io
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Writing packaging book
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@ahultner
Hultnér Technologies
- Alexander Hultnér
- Magnus Junghard
- Office in Gothenburg
- Consulting
- In-house development
- Looking to hire devs in Gothenburg
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@ahultner
About us
Outline
- Why do we care?
- What is a Python Package?
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Distribution types
- Source distribution
- Eggs
- Wheels
-
Hands on!
- Deconstruct a package
- Build a package from scratch
- Modern tooling
- More resources
- Q&A
@ahultner
Why do we care?
- Distribution
- Code sharing, reusability
- Separation of concerns
- Understand the magic behind the curtains
@ahultner
- Bundle
- Distribution format
- Python Libraries
- Applications / dev tools
- PyPI
- Private Repositories
What's a Python Package?
Quick introduction
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@ahultner
- Source distributions
- (sdist), .tar.gz
- Eggs
- .egg
- Wheels
- .whl
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Formats
Python Packaging Formats
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@ahultner
- Source distributions
- Usually pkg.tar.gz files
- pkg.zip
- pkg.tar.[bz2, xz, (Z*)]
- Source code
- Needs to be compiled
- Distribute to unsupported platforms
- Executes setup.py for dependencies
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sdist
Python Packaging Formats
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@ahultner
- De-facto standard
- .egg files
- Compiled "binary distribution"
- Legacy format replaced by standard
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Egg
Python Packaging Formats
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@ahultner
-
"New"Â standard format
- PEP 427 accepted 2013
- Replaces eggs, can convert to whl
- Installation format
- .whl-files
- Compatibility targets in file name
- Resolve dependencies statically
- No need for setup.py
- Signed, RECORD checked on install
- Versioned format
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Wheel
Python Packaging Formats
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@ahultner
Hands on session
Explore python packages
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@ahultner
Conclusion
- sdist is for source code
- Wheels replaces eggs
- Wheels simple zipfiles
- Static metadata format
- Enables faster and better tooling
- We can now distribute binary packages natively without conda
- Packaging is easy with modern tools
@ahultner
Questions
Contact me if you have any further
questions.
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Want to learn more?
Available for training, workshops and
freelance consulting.
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Links
@ahultner
Unpack Python Packages 📦 – Deep dive into the wheels of python packaging
By Alexander Hultnér
Unpack Python Packages 📦 – Deep dive into the wheels of python packaging
Live stream: https://youtu.be/kO5Es7KKUIY This talk provides a hands-on deep-dive into the wheel file format and python packaging. First, we will slash the tire, see what's inside, and then build new wheels from scratch. You will learn about the inner workings of a crucial part of the Python packaging ecosystem and understand what your tools do behind the covers.
