fix bug in reduce op (#23795)

* fix bug in reduce op test=develop

* fix bug in reduce op test=develop

python/paddle/fluid/layers/nn.py

@@ -4298,14 +4298,16 @@ def reduce_sum(input, dim=None, keep_dim=False, name=None):
         dim = [dim]
 
     if in_dygraph_mode():
-        reduce_all = True if dim == None or dim == [] else False
+        reduce_all = True if dim == None or dim == [] or len(dim) == len(
+            input.shape) else False
         dim = dim if dim != None and dim != [] else [0]
         return core.ops.reduce_sum(input, 'dim', dim, 'keep_dim', keep_dim,
                                    'reduce_all', reduce_all)
     attrs = {
         'dim': dim if dim != None and dim != [] else [0],
         'keep_dim': keep_dim,
-        'reduce_all': True if dim == None or dim == [] else False
+        'reduce_all': True
+        if dim == None or dim == [] or len(dim) == len(input.shape) else False
     }
     check_variable_and_dtype(
         input, 'input', ['float32', 'float64', 'int32', 'int64'], 'reduce_sum')
@@ -4373,14 +4375,16 @@ def reduce_mean(input, dim=None, keep_dim=False, name=None):
         dim = [dim]
 
     if in_dygraph_mode():
-        reduce_all = True if dim == None or dim == [] else False
+        reduce_all = True if dim == None or dim == [] or len(dim) == len(
+            input.shape) else False
         dim = dim if dim != None and dim != [] else [0]
         return core.ops.reduce_mean(input, 'dim', dim, 'keep_dim', keep_dim,
                                     'reduce_all', reduce_all)
     attrs = {
         'dim': dim if dim != None and dim != [] else [0],
         'keep_dim': keep_dim,
-        'reduce_all': True if dim == None or dim == [] else False
+        'reduce_all': True
+        if dim == None or dim == [] or len(dim) == len(input.shape) else False
     }
     check_variable_and_dtype(
         input, 'input', ['float32', 'float64', 'int32', 'int64'], 'reduce_mean')
@@ -4450,7 +4454,8 @@ def reduce_max(input, dim=None, keep_dim=False, name=None):
         attrs={
             'dim': dim if dim != None and dim != [] else [0],
             'keep_dim': keep_dim,
-            'reduce_all': True if dim == None or dim == [] else False
+            'reduce_all': True if dim == None or dim == [] or
+            len(dim) == len(input.shape) else False
         })
     return out
 
@@ -4511,7 +4516,8 @@ def reduce_min(input, dim=None, keep_dim=False, name=None):
         attrs={
             'dim': dim if dim != None and dim != [] else [0],
             'keep_dim': keep_dim,
-            'reduce_all': True if dim == None or dim == [] else False
+            'reduce_all': True if dim == None or dim == [] or
+            len(dim) == len(input.shape) else False
         })
     return out
 
@@ -4573,7 +4579,8 @@ def reduce_prod(input, dim=None, keep_dim=False, name=None):
         attrs={
             'dim': dim if dim != None and dim != [] else [0],
             'keep_dim': keep_dim,
-            'reduce_all': True if dim == None or dim == [] else False
+            'reduce_all': True if dim == None or dim == [] or
+            len(dim) == len(input.shape) else False
         })
     return out
 
@@ -4631,7 +4638,8 @@ def reduce_all(input, dim=None, keep_dim=False, name=None):
         attrs={
             'dim': dim if dim != None and dim != [] else [0],
             'keep_dim': keep_dim,
-            'reduce_all': True if dim == None or dim == [] else False
+            'reduce_all': True if dim == None or dim == [] or
+            len(dim) == len(input.shape) else False
         })
     return out
 
@@ -4689,7 +4697,8 @@ def reduce_any(input, dim=None, keep_dim=False, name=None):
         attrs={
             'dim': dim if dim != None and dim != [] else [0],
             'keep_dim': keep_dim,
-            'reduce_all': True if dim == None or dim == [] else False
+            'reduce_all': True if dim == None or dim == [] or
+            len(dim) == len(input.shape) else False
         })
     return out
 

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

@@ -56,7 +56,7 @@ class TestVarianceLayer(unittest.TestCase):
         return np.var(self._input, axis=axis, keepdims=keepdim, ddof=ddof)
 
     def test_equal(self):
-        places = []
+        places = [fluid.CPUPlace()]
         if fluid.core.is_compiled_with_cuda():
             places.append(fluid.CUDAPlace(0))
         for place in places: