#66 Wait, NoSQL with ACID and transactions?

Python Bytes - A podcast by Michael Kennedy and Brian Okken - Luni

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Tehnologie

Sponsored by Rollbar: https://pythonbytes.fm/rollbar

Brian #1: Object-Oriented Programming (OOP) in Python 3

  • Real Python
  • Nice modern introduction to classes, inheritance, and OOP.
  • Classes, objects, attributes, instances, and inheritance.
  • One gotcha not mentioned
    • The __init__() method of a base class is not called automatically by derived classes. If you override it, you need to call super().__init__().
  • Also, check out attrs for much of our OOP needs

Michael #2: ScriptedForms

  • Quickly create live-update GUIs for Python packages using Markdown and a few custom HTML elements.
  • Just write in markdown + variables / UI types
  • Based on Jupyter

Brian #3: MongoDB to add multi-document transactions and ACID

  • Mind blown. Didn’t see this coming
  • “MongoDB 4.0 will add support for multi-document transactions, making it the only database to combine the speed, flexibility, and power of the document model with ACID data integrity guarantees. Through snapshot isolation, transactions provide a globally consistent view of data, and enforce all-or-nothing execution to maintain data integrity.”
  • Due out this summer.

Michael #4: Python packaging pitfalls

  • Just a short list of packaging blunders
    • Forgetting to clean the build dir
    • Forgetting to specify package data
    • Fine grained MANIFEST.in
    • Using package_data, or worse: fine grained package_data
    • Listing excludes/prunes before includes/grafts
    • Hardcoding packages list in setup.py
    • Hardcoding py_modules list in setup.py
    • Importing your package in setup.py
    • Importing unavailable tools in setup.py
    • Messing with the environment
    • Your tests do not test the installed code

Brian #5: Blogging principles

  • Julia Evans @b0rk
  • Be honest about what you know
  • Try not to write anything too long.
    • (My note: don’t shy away from long tutorials. Just don’t only do long stuff)
  • Be positive.
  • Write for the past you.
  • Stick with your own experience.
  • It’s ok if not everyone likes it
    • Don’t try to keep one upping yourself.

Michael #6: pipenv is officially official

  • Pipenv — the officially recommended Python packaging tool from Python.org, free (as in freedom).
    • Pipenv is a tool that aims to bring the best of all packaging worlds (bundler, composer, npm, cargo, yarn, etc.) to the Python world.
    • Windows is a first–class citizen, in our world.
  • Benefits?
    • It automatically creates and manages a virtualenv for your projects
    • adds/removes packages from your Pipfile as you install/uninstall packages
    • generates the ever–important Pipfile.lock, which is used to produce deterministic builds.

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