BUG: avoid triggering numpy deprecation warning in assert functions for nested array with empty array/list

Author: jorisvandenbossche

pandas/_libs/lib.pyx

@@ -600,6 +600,8 @@ def array_equivalent_object(ndarray left, ndarray right) -> bool:
                     if not array_equivalent(x, y):
                         return False
 
+            elif PyArray_Check(x) or PyArray_Check(y):
+                return False
             elif (x is C_NA) ^ (y is C_NA):
                 return False
             elif not (

pandas/tests/util/test_assert_almost_equal.py

@@ -534,6 +534,10 @@ def test_assert_almost_equal_iterable_values_mismatch():
         np.array([np.array([1, 2, 3]), np.array([4, 5])], dtype=object),
         np.array([[1, 2, 3], [4, 5]], dtype=object),
     ),
+    (
+        np.array([np.array([], dtype=object), None], dtype=object),
+        np.array([[], None], dtype=object),
+    ),
     (
         np.array(
             [