fix(python_api): correct hasattr call for __array_interface__ check

AUTHORS

@@ -197,6 +197,7 @@ Guido Wesdorp
 Guoqiang Zhang
 Hamza Mobeen
 Harald Armin Massa
+Harsh Kumar
 Harshna
 Henk-Jaap Wagenaar
 Holger Kohr

changelog/14456.bugfix.rst

@@ -0,0 +1 @@
+Fixed ``hasattr`` call in ``_as_numpy_array`` that incorrectly used the string literal ``"obj"`` instead of the variable ``obj`` when checking for ``__array_interface__``, causing objects implementing only ``__array_interface__`` to not be recognized as numpy-like arrays by ``pytest.approx``.

src/_pytest/python_api.py

@@ -906,6 +906,6 @@ 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