Fix function redefine (#34186)

* fix func redef

* fix-func-redef

python/paddle/fluid/tests/unittests/test_grid_sampler_op.py

@@ -197,7 +197,7 @@ class Case1(TestGridSamplerOp):
         self.mode = "bilinear"
 
 
-class Case1(TestGridSamplerOp):
+class Case1_(TestGridSamplerOp):
     def initTestCase(self):
         self.x_shape = (2, 3, 5, 6)
         self.grid_shape = (2, 8, 9, 2)

python/paddle/fluid/tests/unittests/xpu/test_matmul_op_xpu.py

@@ -266,7 +266,7 @@ for dims in xpu_support_dims_list:
 
 
             # Test case n-dim
-def generate_compatible_shapes(dim, transpose_X, transpose_Y):
+def generate_compatible_shapes_(dim, transpose_X, transpose_Y):
     M = 2
     N = 4
     K = 3
@@ -293,8 +293,8 @@ for dim in [4]:
             test_name = (
                 'TestMatMulOp_dimX_{}_dim_Y_{}_transX_{}_transY_{}'.format(
                     dim, dim, transpose_X, transpose_Y))
-            shape_X, shape_Y = generate_compatible_shapes(dim, transpose_X,
-                                                          transpose_Y)
+            shape_X, shape_Y = generate_compatible_shapes_(dim, transpose_X,
+                                                           transpose_Y)
             globals()[test_name] = type(test_name, (Generator, XPUOpTest), {
                 'shape_X': shape_X,
                 'shape_Y': shape_Y,