diff --git a/mindspore/_extends/parse/standard_method.py b/mindspore/_extends/parse/standard_method.py
index 13f07b9e83f..e472692e7a3 100644
--- a/mindspore/_extends/parse/standard_method.py
+++ b/mindspore/_extends/parse/standard_method.py
@@ -56,14 +56,23 @@ def mean(x, axis=(), keep_dims=False):
     Reduces a dimension of a tensor by averaging all elements in the dimension.
 
     Args:
-        axis (Union[None, int, tuple(int)]): Dimensions of reduction,
-            when axis is None or empty tuple, reduce all dimensions.
-            Default: (), reduce all dimensions.
-        keep_dims (bool): Whether to keep the reduced dimensions.
-            Default : False, don't keep these reduced dimensions.
+        axis (Union[None, int, tuple(int), list(int)]): Dimensions of reduction,
+            when axis is None or empty tuple, reduce all dimensions. Default: ().
+        keep_dims (bool): Whether to keep the reduced dimensions. Default: False.
 
     Returns:
-        Tensor, has the same data type as x.
+        Tensor, has the same data type as input tensor.
+
+    Supported Platforms:
+        ``Ascend`` ``GPU`` ``CPU``
+
+    Examples:
+        >>> import numpy as np
+        >>> from mindspore import Tensor
+        >>> input_x = Tensor(np.array([1, 2, 3], dtype=np.float32))
+        >>> output = input_x.mean()
+        >>> print(output)
+        2.0
     """
     if axis is None:
         axis = ()
@@ -501,7 +510,7 @@ def cumsum(x, axis=None, dtype=None):
         >>> import numpy as np
         >>> from mindspore import Tensor
         >>> a = Tensor(np.ones((3,3)).astype("float32"))
-        >>> output = a.cumsum()
+        >>> output = a.cumsum(axis=0)
         >>> print(output)
         [[1. 1. 1.]
         [2. 2. 2.]
@@ -909,8 +918,7 @@ def choose(x, choices, mode='clip'):
 
     Examples:
         >>> import mindspore.numpy as np
-        >>> choices = [[0, 1, 2, 3], [10, 11, 12, 13],
-            [20, 21, 22, 23], [30, 31, 32, 33]]
+        >>> choices = [[0, 1, 2, 3], [10, 11, 12, 13], [20, 21, 22, 23], [30, 31, 32, 33]]
         >>> x = np.array([2, 3, 1, 0])
         >>> print(x.choose(choices))
         [20 31 12  3]
diff --git a/mindspore/common/tensor.py b/mindspore/common/tensor.py
index 6cde5c932a6..5cfdb482116 100644
--- a/mindspore/common/tensor.py
+++ b/mindspore/common/tensor.py
@@ -491,7 +491,18 @@ class Tensor(Tensor_):
             keep_dims (bool): Whether to keep the reduced dimensions. Default: False.
 
         Returns:
-            Tensor, has the same data type as x.
+            Tensor, has the same data type as input tensor.
+
+        Supported Platforms:
+            ``Ascend`` ``GPU`` ``CPU``
+
+        Examples:
+            >>> import numpy as np
+            >>> from mindspore import Tensor
+            >>> input_x = Tensor(np.array([1, 2, 3], dtype=np.float32))
+            >>> output = input_x.mean()
+            >>> print(output)
+            2.0
         """
         self.init_check()
         if axis is None:
@@ -839,7 +850,7 @@ class Tensor(Tensor_):
             >>> import numpy as np
             >>> from mindspore import Tensor
             >>> a = Tensor(np.ones((3,3)).astype("float32"))
-            >>> output = a.cumsum()
+            >>> output = a.cumsum(axis=0)
             >>> print(output)
             [[1. 1. 1.]
             [2. 2. 2.]
@@ -1464,8 +1475,7 @@ class Tensor(Tensor_):
         Examples:
             >>> import numpy as np
             >>> from mindspore import Tensor
-            >>> choices = [[0, 1, 2, 3], [10, 11, 12, 13],
-                [20, 21, 22, 23], [30, 31, 32, 33]]
+            >>> choices = [[0, 1, 2, 3], [10, 11, 12, 13], [20, 21, 22, 23], [30, 31, 32, 33]]
             >>> x = Tensor(np.array([2, 3, 1, 0]))
             >>> print(x.choose(choices))
             [20 31 12  3]
@@ -1651,7 +1661,7 @@ class Tensor(Tensor_):
         Examples:
             >>> import numpy as np
             >>> from mindspore import Tensor
-            >>> input_x = Tensor(np.array([1., 2., 3., 4.]))
+            >>> input_x = Tensor(np.array([1, 2, 3, 4], dtype=np.float32))
             >>> output = input_x.std()
             >>> print(output)
             1.118034
@@ -1697,10 +1707,10 @@ class Tensor(Tensor_):
         Examples:
             >>> import numpy as np
             >>> from mindspore import Tensor
-            >>> input_x = Tensor(np.array([-1, 0, 1]).astype('int32'))
+            >>> input_x = Tensor(np.array([-1, 0, 1]).astype(np.float32))
             >>> print(input_x.sum())
-            0
-            >>> input_x = Tensor(np.arange(10).reshape(2, 5).astype('float32'))
+            0.0
+            >>> input_x = Tensor(np.arange(10).reshape(2, 5).astype(np.float32))
             >>> print(input_x.sum(axis=1))
             [10. 35.]
         """