Python Bytes

Topics covered in this episode:

• Make Each Line Count, Keeping Things Simple in Python
• Parsel
• A Comprehensive Guide to Python Logging with Structlog
• Stamina
• Extras
• Joke

About the show

Sponsored by Sentry: pythonbytes.fm/sentry

Connect with the hosts

• Michael: @mkennedy@fosstodon.org
• Brian: @brianokken@fosstodon.org
• Show: @pythonbytes@fosstodon.org

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Tuesdays at 11am PT. Older video versions available there too.

Brian #1: Make Each Line Count, Keeping Things Simple in Python

• Bob Belderbos
• Some great tips to help you simplify your Python code to make it more understandable and maintainable.

Michael #2: Parsel

• Parsel is a BSD-licensed Python library to extract data from HTML, JSON, and XML documents.
• Parsel lets you extract data from XML/HTML documents using XPath or CSS selectors.
• It supports:
  • CSS and XPath expressions for HTML and XML documents
  • JMESPath expressions for JSON documents
  • Regular expressions # Want a RSS feed detail from a website standard HTML? selector = parsel.Selector(text=html_text) for link in selector.css('head > link'): rel = link.xpath('.//@rel').get() rel_type = link.xpath('.//@type').get() href = link.xpath('.//@href').get()

Brian #3: A Comprehensive Guide to Python Logging with Structlog

• Stanley Ulili
• structlog is an awesome logging tool, and already has great documentation.
• However, this article is a great starting point, highlighting:
  • how easy it is to get started using structlog
  • configuring the default log level
  • changing the formatting
  • customizing the time stamp
  • adding custom fields
  • adding contextual data
  • filtering
  • async
  • …

Michael #4: Stamina

• via Matthias Bach, by Hynek
• Production-grade Retries Made Easy
• stamina is an opinionated wrapper around the great-but-unopinionated Tenacity package. Its goal is to be as ergonomic as possible, while doing the right thing by default, while minimizing potential for misuse.
• General additions on top of Tenacity
  • Retry only on certain exceptions.
  • Exponential backoff with jitter between retries.
  • Limit the number of retries and total time.
  • Automatic async support.
  • Preserve type hints of the decorated callable.
  • Count (Prometheus) and log (structlog) retries with basic metadata, if they’re installed.
  • Easy global deactivation for testing.

Extras

Brian:

• The “pytest fixtures” chapter of the pytest course is available now.
  • Also, the PYTHONBYTES 20% discount still active for bundle through the end of August.

Michael:

• Python 3.12.0 release candidate 1 released
• PyCon UK: The conference takes place from the 22nd to the 25th of September in Cardiff, Wales. The schedule is available at 2023.pyconuk.org/schedule/ and tickets are available at 2023.pyconuk.org/tickets/.
• PyData Eindhoven 2023, Nov 30 CFP open
• PyData Seattle Language Creators Charity Fundraiser: Adele Goldberg - Smalltalk, Guido Van Rossum, Anders Hejlsberg, C#, and James Gosling - Java. September 19, 2023: 12:00 - 4:00 PM, in person only.

Joke:

• Librarian
• chatgpt-failures