python-attrs / python-attrs/attrs

Support for automatic runtime type-checking

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Feature
Dominant language
Python
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Avg merge
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Merged PRs (30d)
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Description

This has been proposed and discussed in https://github.com/python-attrs/attrs/issues/215, as a possible use case for the newly added type argument to attr.ib() #239

quoting @hynek https://github.com/python-attrs/attrs/issues/215#issuecomment-347529479

a good first step would be to add generic class-wide validators (@attr.s(validator=whatever)) and then make type checking a special case of it, possibly with some syntactic sugar.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the proposal in issue #215 and the discussion around the newly added type argument to attr.ib() in issue #239. The quoted direction is to consider class-wide validators via @attr.s(validator=whatever) before treating type checking as a special case. Done should include an agreed design and implementation scope for automatic runtime type-checking.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
developer-experience
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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