python-attrs / python-attrs/attrs
Provide a builtin validator that takes a boolean function.
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- Python
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Description
Currently, validators are required to raise an exception, if the value isn't appropriate. If I currently have a function for checking the property, but returns a boolean, instead of raising, to use it as a validator, I have to write a wrapper that converts the return to an exception. It would be nice if attrs provided such a wrapper itself.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the existing validator entry points and reviewing how validators signal invalid values. Define the expected behavior for wrapping a boolean-returning function, including its invalid-value error, and confirm the validator API and documentation consistently describe the new option.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100