## TL;DR
Run `python -m pip install attrs`, or reinstall hypothesis with dependencies: `python -m pip install --force-reinstall hypothesis`. Hypothesis depends on attrs; skipping deps leaves it missing.

```text
ModuleNotFoundError: No module named 'attrs'
```

## Fix it

1. **Install the missing dep.** Run `python -m pip install attrs`.
   - Expected: `Successfully installed attrs-...`.

2. **Verify.** Run `python -c "import hypothesis; print('ok')"`.
   - Expected: prints `ok`.

## When this applies
- Importing hypothesis fails naming attrs.
- Minimal installs with `--no-deps`.

## When it does not apply
- If hypothesis itself is missing, install it first.

## Tool compatibility
hypothesis 6.x requires attrs. Python 3.8+.

## Why it happens
attrs is a hard dependency of hypothesis. Dependency-skipping installs break it.

## Edge cases
- Note the package is `attrs` (plural); the classic import is `import attr` or `import attrs`. Install the package name with pip.