#139 f"Yes!" for the f-strings
Published July 18, 2019
38 min
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    Sponsored by DigitalOcean: pythonbytes.fm/digitalocean

    Special guest: Ines Montani

    Brian #1: Simplify Your Python Developer Environment

    • Contributed by Nils de Bruin
    • “Three tools (pyenv, pipx, pipenv) make for smooth, isolated, reproducible Python developer and production environments.”
    • The tools:
      • pyenv - install and manage multiple Python versions and flavors
      • pipx - install a Python application with it’s own virtual environment for use globally
      • pipenv - managing virtual environments, dependencies, on a per project basis
    • Brian note: I’m not sold on any of these yet, but honestly haven’t given them a fair shake either, but also didn’t really know how to try them all out. This is a really good write up to get started.

    Ines #2: New fast.ai course: A Code-First Introduction to Natural Language Processing

    • fast.ai is a really popular, free course for deep learning by Rachel Thomas and Jeremy Howard
    • Also comes with a Python library and lots of notebooks
    • Some influential research developed alongside the course, e.g. ULMFiT (popular algorithm for NLP tasks like text classification)
    • New course on Natural Language Processing:
      • Practical introduction to NLP covering both modern neural network approaches and traditional techniques
      • Highlights:
        • NLP background: topic modeling and linear models
        • Rule-based approaches and real-world problem solving
        • Focus on ethics – videos on bias and disinformation

    Michael #3: Cloning the human voice

    Brian #4: Ab(using) pyproject.toml and stuffing pytest.ini and mypy.ini content into it

    • Contributed by Andrew Spittlemeister
    • My first reaction is horror, but this is kinda my thought process with this one
      • toml is not ini (but they look close)
      • neither pytest nor mypy support storing configuration in pyproject.toml
      • they both do support using setup.cfg (but flit and poetry projects don’t use that file, or try not to)
      • they both support passing in the config file as a command line argument
      • you can be careful and write a pyproject.toml file that is both toml and ini compliant
      • drat, this is a reasonable idea, if not a little wacky
      • no guarantee that it will keep working
    • one thing to note: use quotes for stuff you normally wouldn’t need to in ini file.

    Example ini:

        addopts = -ra -v

    if stuffed in pyproject.toml

        addopts = "-ra -v"

    to run:

        > mypy --config-file pyproject.toml module_name
        > pytest -c pyproject.toml

    Ines #5: *Polyaxon*

    • A platform for reproducing and managing the whole life cycle of machine learning and deep learning applications.
    • We talked to lots of research groups and everyone works with just their GPU on desktop. Super slow – you need to wait for results, schedule next job etc.
    • Polyaxon is a free open source library built on Kubernetes. Really easy to set up, especially on Google Kubernetes Engine.
    • Especially good for hyper-parameter search, where you might not need GPU experiments if you can run lots of experiments in parallel
    • Release v0.5 just came today. Big improvements:
      • Plugins system
      • Local runs, for much easier debugging
      • New workflow engine for chaining things together and run experiments with lots of steps

    Michael #6: Flynt for f-strings

    • A tool to automatically convert old string literal formatting to f-strings
    • F-Strings: Not only are they more readable, more concise, and less prone to error than other ways of formatting, but they are also faster!
    • Converted over 500 lines / expressions in Talk Python Training and Python Bytes.
    • Get started with a pipx install: pipx install flynt
    • Then point it at
      • A file: flynt somefile.py
      • A directory (recursively): flynt ./
    • Converts code like this: print(``"``Greetings {}, you have found {:,} items!``"``.format(name, count))
    • To code like this: print(f"Greetings {name}, you have found {count:,} items!")
    • Beware of the digit grouping bug.
    • Good project to jumping in and contributing to open source




    • Explosion (?)
    • spaCy IRL 2019
      • our very first conference held on July 6 in Berlin
      • many amazing speakers from research, applied NLP and the community
      • all talks were recorded and will be up on our YouTube channel very soon
    • FastAPI core developer Sebastián Ramírez is joining our team
      • FastAPI was presented by Brian in episode 123 of this podcast
      • we’re big fans and have been switching all our APIs over to FastAPI
      • we’ll keep supporting the project and will definitely give Sebastián enough time to keep working on it


    • A programmer walks into a bar and orders 1.38 root beers. The bartender informs her it's a root beer float. She says 'Make it a double!’
    • What do you call a developer without a side project?
      • Well rested.
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