Episode #50: Bundling , shipping, and protecting Python applications
Python Bytes 50
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Brian #1: Think Like a Pythonista
- 2017, by @standupdev Luciano Ramalho
- The PyBay2017 playlist
- Covered in “Think Lika a Pythonista”
- Creating a container type, a Deck of Cards.
- Luciano shows how to utilize duck typing, builtin types, and operator overloading while creating a type without inheritance.
- Uses a Jupyter notebook to work with the code.
- Describes and shows monkeypatching to implement shuffle.
- Watch until the end, he takes feedback from the audience to optimize some code.
Michael #2: Serpent.AI - Game Agent Framework
- Turn ANY video game in a sandbox environment for AI & Bot programming with Python.
- goal with Serpent.AI is to lower the barriers to entry when it comes to using games as sandboxes for code experiments.
- It unlocks your entire existing game library (Steam, DRM-Free etc.) to be used as potential game agent environments and it does so natively
- It also doesn't try to dictate how you solve your problems. Your game agent is your canvas!
- Even a twitch channel with live PyCharm + Jupyter + Game. Here’s a cool example: https://go.twitch.tv/videos/173580782
- Provides some useful conventions but is absolutely NOT opinionated about what you put in your agents:
- Want to use the latest, cutting-edge deep reinforcement learning algorithm? ALLOWED.
- Want to use computer vision techniques, image processing and trigonometry? ALLOWED.
- Want to randomly press the Left or Right buttons? sigh ALLOWED.
Brian #3: MkDocs
- I’ve been creating pytest plugins using the pytest-plugin cookiecutter.
- One option is to start the documentation using mkdocs, so I thought I’d try it out.
- For the most part, you have a yaml file to configure things, and a directory with markdown files in it. Then you call
mkdocs buildand blammo, your documentation is built. I like markdown, so I’m going to try working with mkdocs more.
- Also want to try:
- Generating documentation from source code using Christian Medina’s How to write your own Python documentation generator article and the code in a snippet, gendocs.py.
- I know about Sphinx, but I’m not a fan of reStructured text.
Michael #4: PyInstaller 3.3 released
- PyInstaller is a program that freezes (packages) Python programs into stand-alone executables, under Windows, Linux, Mac OS X, FreeBSD, Solaris and AIX.
- The main goal of PyInstaller is to be compatible with 3rd-party packages out-of-the-box.
- Libraries like PyQt, Django or matplotlib are fully supported, without having to handle plugins or external data files manually.
- The #1 thing that stands out to me in this release: Python 3.6 support!
- PyInstaller can produce single immutable self contained dependency free portable exe files using the --one-file option.
- Consider the --noconsole option too
- cx_freeze vs pyinstaller? I can tell you that pyinstaller does a much better job of actually detecting and including dependencies. I recently tried both for freezing a multi-threaded, scipy based application and cx_freeze was a real hassle to get functional. Pyinstaller more or less just magically worked in my case whereas cx_freeze took hours of debugging.
- Developed by twitter. Originally part of the twitter.commons package.
pexis a tool to create PEX files, which are “files are self-contained executable Python virtual environments.”, from pex.readthedocs.io.
- Python can import from zip files. You can add instructions at the beginning of a zip file to make it look like a python script.
pexallows you to do that.
- Watch WTF is PEX?, a 16 min video describing how it works. Brian Wickman
Michael #6: Using Cython to protect a Python codebase
- A Python project that required the whole codebase to be protected
- They used Cython
- By following this guide, you should be able to cythonize a Python codebase with non-trivial package/module structure, thus making it difficult for evil hackers to reverse engineer it and steal your programming know-how.
- Although protecting Python sources from reverse engineering seems like a futile task at first, cythonizing all the code leads to a reasonable amount of security
- This was a Flask project!
- The current standard for Python archives is the wheel format (.whl), which aims to replace the .egg format. So, let's try to create a wheel with
python setup.py bdist_wheel!
- Apparently, the archive contains not only compiled code, but also the sources.
- There is a way to fix this, however it is counter-intuitive.
- Python for Windows developers: A survey → https://docs.google.com/forms/d/e/1FAIpQLSdygLS0G91t5E8LCGtZvdfzeqdePr2jFqoiR30HZjmGbaJjNQ/viewform-