← oracle_full

rich_3894

resolved RESOLVED UNSUBMITTED PASS · None tool calls · 0 s · Textualize/rich

Task input

Handle unusual __qualname__ in inspect

<!--
Please note that Rich isn't accepting any new features at this point.

If a feature can be implemented without modifying the core library, then
they should be released as a third-party module. I can accept updates to the
core library that make it easier to extend (think hooks).

Bugfixes are always welcome of course.

Sometimes it is not clear what is a feature and what is a bug fix.
If there is any doubt, please open a discussion first.

-->

<!--
*Are you contributing typo fixes?*

If your PR solely consists of typos, at least one must be in the docs to warrant an addition to CONTRIBUTORS.md
-->

## Type of changes

- [x] Bug fix
- [ ] New feature
- [ ] Documentation / docstrings
- [x] Tests
- [ ] Other

## Checklist

- [x] I've run the latest [black](https://github.com/psf/black) with default args on new code.
- [x] I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate (see note about typos above).
- [x] I've added tests for new code.
- [x] I accept that @willmcgugan may be pedantic in the code review.

## Description

I discovered, that an object with an unusual `__qualname__` attribute (not a `str`, e.g. a descriptor) causes `inspect` to fail.
This can happen if an object is created this way intentionally, but I discovered it, when decorating a class with `@functools.lru_cache` which forwards the underlying attributes using a descriptor when it can't add the to it's `__dict__` because the class uses `__slots__`:

```python
from functools import lru_cache
from rich import inspect


@lru_cache
class Klaas:
    __slots__ = ("__qualname__",)


if __name__ == "__main__":
    from rich.traceback import install

    install()

    inspect(Klaas.__qualname__)
    inspect(Klaas, all=True)
```

I fixed it by checking the type of `__qualname__` falling back to `__name__` and if that isn't a `str` using the already provided fallback.

Tool calls (0)

Patch

--- a/rich/_inspect.py
+++ b/rich/_inspect.py
@@ -101,6 +101,10 @@ def _get_signature(self, name: str, obj: Any) -> Optional[Text]:
         signature_text = self.highlighter(_signature)
 
         qualname = name or getattr(obj, "__qualname__", name)
+        if not isinstance(qualname, str):
+            qualname = getattr(obj, "__name__", name)
+            if not isinstance(qualname, str):
+                qualname = name
 
         # If obj is a module, there may be classes (which are callable) to display
         if inspect.isclass(obj):

Test output

...s....sss...................................                           [100%]
42 passed, 4 skipped in 0.18s