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Keynote - Preventing, Finding, and Fixing Bugs On a Time Budget | Raymond Hettinger @ PyBay2018

SF Python · 27K views · 2018-09-21 · 40:01

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Overview

Raymond Hettinger's PyBay 2018 keynote on preventing, finding and fixing bugs under a time budget. He covers testing practice, type annotation tradeoffs and the limits of coverage metrics.

On Hacker News

HN cites it in Python testing and code quality threads, including his point that 100% coverage proves little.

Recommended by 1 HN people across 1 months · HN mentions 2020–2022

Topics

Testing, debugging & developer toolsPython, Ruby & scripting languages
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pythontestingdebuggingraymond hettingercode coverage

What people said

Rendello · 2021-03 · Recommendation

This is a good talk by the core developer Raymond Hettinger [1]. He prefers pytest too. I don't do any crazy testing, but I really like property-based testing with Hypothesis, which is also mentioned. This video isn't Python but it's a great intro to property-based testing [2]. 1. [VIDEO] 2. [LINK]

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TrickardRixx · 2022-12 · Reference

Please see Raymond Hettinger's keynote on efficiently handling bugs[0]. He makes the case that static type checking is a boon for Python except for in specific programs that make extensive use of covariant and/or contravariant types. [0] [VIDEO]

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hbrn · 2022-12 · Reference

My examples are just personal anecdotes, you can dismiss them by saying "our team won't make the same mistake". If your goal is 100% coverage then it will turn testing into ritual and only give you the illusion of quality. Instead of testing inputs and edge cases, you will focus on testing lines of code. There's a good illustration of uselessness of 100% coverage in one of Raymond Hettinger talks: [VIDEO] > I use testing as a tool to be sure we ship quality code I suspect we have different definitions of quality, and your might include testing, so I doubt I will be able to convince you.

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Sources

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