Fix _as_numpy_array: use variable obj instead of string literal "obj"

AUTHORS

@@ -21,6 +21,7 @@ Alex Lambson
 Alexander Johnson
 Alexander King
 Alexei Kozlenok
+algojogacor
 Alice Purcell
 Allan Feldman
 Aly Sivji

changelog/14456.bugfix.rst

@@ -0,0 +1 @@
+Fixed a bug in :func:`pytest.approx` where ``_as_numpy_array`` incorrectly used a string literal ``"obj"`` instead of the variable ``obj`` when checking for ``__array_interface__``, causing objects implementing only ``__array_interface__`` (without ``__array__``) to not be recognized as numpy-like arrays.

src/_pytest/python_api.py

@@ -925,6 +925,6 @@ def _as_numpy_array(obj: object) -> ndarray | None:
             return None
         elif isinstance(obj, np.ndarray):
             return obj
-        elif hasattr(obj, "__array__") or hasattr("obj", "__array_interface__"):
+        elif hasattr(obj, "__array__") or hasattr(obj, "__array_interface__"):
             return np.asarray(obj)
     return None