Hynek Schlawack

@hynek-schlawack · 16 positions · On ppll ↗

Software engineer and open-source maintainer of attrs and structlog; writes about Python, software design and career growth at hynek.me.

Hynek Schlawack did not write this page.

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What Hynek Schlawack says most about

software quality 7

Using nested mocks to mimic third-party APIs can make tests brittle, unidiomatic, and difficult to debug.
The principle 'Don't Mock What You Don't Own' means that mock objects should be used to substitute one's own objects rather than third-party ones.

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developer tools 4

Nox is more powerful than tox out-of-the-box because it provides access to the Python standard library.
Nox treats Python versions as first-class selectors for sessions, whereas tox treats them as factors.

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Python 4

The npm ecosystem's project-directory-local-first packaging was ahead of the Python ecosystem.
Using virtual environments makes Python's import behavior more predictable and debugging easier.

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design 2

Properly implemented composition provides better reading clarity than inheritance.
Code sharing via subclassing is an ineffective way to customize more than one behavioral aspect of a class.

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