#116 So you want Python in a 3D graphics engine?
Python Bytes - Podcast tekijän mukaan Michael Kennedy and Brian Okken - Maanantaisin
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Sponsored by pythonbytes.fm/digitalocean
- Interactive tutorial on dictionaries
- Searching efficiently in a list
- Why are hash tables called has tables?
- Putting it all together to make an “almost”-Python-dict
- How Python dict really works internally
- Yes this is a super deep dive, but wow it’s cool.
- Tons of the code is runnable right there in the web page, including moving visual representations, highlighted code with current line of code highlighted.
- Some examples allow you to edit values and play with stuff.
- You may notice a theme throughout my set of picks on this episode
- Games built on Unreal Engine 4 include
- Plugin embedding a whole Python VM in Unreal Engine 4 (both the editor and runtime).
- This means you can use the plugin to write other plugins, to automate tasks, to write unit tests and to implement gameplay elements.
- Here is an example usage. It’s a really nice overview and tutorial for the editor.
- For game elements, check out this section.
- When I want to test the stdout output of some code, that’s easy, I grab the capsys fixture from pytest.
- But what if you want to grab the stdout of a method NOT while testing?
- Enter
[contextlib.redirect_stdout(new_target)](https://docs.python.org/3/library/contextlib.html#contextlib.redirect_stdout)
- so cool. And very easy to read.
- ex:
f = io.StringIO()
with redirect_stdout(f):
help(pow)
s = f.getvalue()
- also a version for
stderr
- via Kolja Lubitz
- Panda3D is an open-source, completely free-to-use engine for realtime 3D games, visualizations, simulations, experiments
- Not just games, could be science as well!
- The full power of the graphics card is exposed through an easy-to-use API. Panda3D combines the speed of C++ with the ease of use of Python to give you a fast rate of development without sacrificing on performance.
- Features:
- Platform Portability
- Flexible Asset Handling: Panda3D includes command-line tools for processing and optimizing source assets, allowing you to automate and script your content production pipeline to fit your exact needs.
- Library Bindings: Panda3D comes with out-of-the-box support for many popular third-party libraries, such as the Bullet physics engine, Assimp model loader, OpenAL
- Performance Profiling: Panda3D includes pstats — an over-the-network profiling system designed to help you understand where every single millisecond of your frame time goes.
- Some questions you may have asked: > How can I produce a dependency graph for Python packages? > Why doesn’t PyPI show a project’s dependencies on it’s project page? > How can I get a project’s dependencies without downloading the package? > Can I search PyPI and filter out projects that have a certain dependency?
- If everything is in
requirements.txt
, you just might be able to, but… setup.py
is dynamic. You gotta run it to see what’s needed.- Dependencies might be environment specific. Windows vs Linux vs Mac, as an example.
- Nothing stopping someone from putting
random.choice()
for dependencies in asetup.py
file. But that would be kinda evil. But could be done. (Listener homework?) - The
wheel
format is way more predictable because it limits some of this freedom.wheel
s don’t get run when they install, they really just get unpacked. - More info on wheels: Kind of a tangent, but what why not:
- From: https://pythonwheels.com
- “Advantages of wheels
- Faster installation for pure Python and native C extension packages.
- Avoids arbitrary code execution for installation. (Avoids setup.py)
- Installation of a C extension does not require a compiler on Linux, Windows or macOS.
- Allows better caching for testing and continuous integration.
- Creates .pyc files as part of installation to ensure they match the Python interpreter used.
- More consistent installs across platforms and machines.”
- via Matthew Ward
- Learn how to program in Python by building a simple dice game
- Build a game framework with Python using the PyGame module
- How to add a player to your Python game
- Using PyGame to move your game character around
- What's a hero without a villain? How to add one to your Python game
- Put platforms in a Python game with PyGame
- Also: Shout out to Mission Python book: Code a Space Adventure Game!
- via @realpython
- Why do Pythons live on land? They are above C-level!