#116 So you want Python in a 3D graphics engine?
Published February 6, 2019
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17 min
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    Sponsored by pythonbytes.fm/digitalocean

    Brian #1: Inside python dict — an explorable explanation

    • 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.
    Michael #2: Embed Python in Unreal Engine 4

    Brian #3: Redirecting stdout with contextlib

    • 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
    Michael #4: Panda3D

    • 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.
    Brian #5: Why PyPI Doesn't Know Your Projects Dependencies

    • 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 a setup.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. wheels 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.”
    Michael #6: PyGame series

    • via @realpython
    • Why do Pythons live on land? They are above C-level!
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