Finished

Test Name	Status
test_issue_17624	Fail
test_zero_matrix_add	Fail
test_bc_matmul	Pass
test_bc_matadd	Pass
test_bc_transpose	Pass
test_bc_dist_diag	Pass
test_block_plus_ident	Pass
test_BlockMatrix	Pass
test_block_collapse_explicit_matrices	Pass
test_BlockMatrix_trace	Pass
test_BlockMatrix_Determinant	Pass
test_squareBlockMatrix	Pass
test_BlockDiagMatrix	Pass
test_blockcut	Pass
test_reblock_2x2	Pass
test_deblock	Pass
test_sort_key	Pass
test_matadd_sympify	Pass
test_matadd_of_matrices	Pass
test_doit_args	Pass
test_generic_identity	Pass

     @property
     def rowblocksizes(self):
+        return [self.blocks[i, 0].rows for i in range(self.blockshape[0])]
+        def _get_rows(block):
+            if hasattr(block, 'rows'):
+                return block.rows
+            elif hasattr(block, 'shape'):
+                return block.shape[0]
+            else:
+                # For scalar objects like Zero, treat as 1x1
+                return 1
+        return [_get_rows(self.blocks[i, 0]) for i in range(self.blockshape[0])]
     @property
     def colblocksizes(self):
+        return [self.blocks[0, i].cols for i in range(self.blockshape[1])]
+        def _get_cols(block):
+            if hasattr(block, 'cols'):
+                return block.cols
+            elif hasattr(block, 'shape'):
+                return block.shape[1]
+            else:
+                # For scalar objects like Zero, treat as 1x1
+                return 1
+        return [_get_cols(self.blocks[0, i]) for i in range(self.blockshape[1])]
     def structurally_equal(self, other):
         return (isinstance(other, BlockMatrix)

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