Update search.py

Author: BrilliantYuKaimin

python/paddle/tensor/search.py

@@ -567,13 +567,13 @@ def where(condition, x=None, y=None, name=None):
         \begin{cases}
         x_i, & \text{if}  \ condition_i \  \text{is} \ True \\
         y_i, & \text{if}  \ condition_i \  \text{is} \ False \\
-        \end{cases}
+        \end{cases}.
 
     Notes:
-        ``paddle.where(condition)`` is identical to ``paddle.nonzero(condition, as_tuple=True)``.
+        ``numpy.where(condition)`` is identical to ``paddle.nonzero(condition, as_tuple=True)``, please refer to :ref:`api_tensor_search_nonzero`.
 
     Args:
-        condition (Tensor): The condition to choose x or y. When True(nonzero), yield x, otherwise yield y.
+        condition (Tensor): The condition to choose x or y. When True (nonzero), yield x, otherwise yield y.
         x (Tensor|scalar, optional): A Tensor or scalar to choose when the condition is True with data type of float32, float64, int32 or int64. Either both or neither of x and y should be given.
         y (Tensor|scalar, optional): A Tensor or scalar to choose when the condition is False with data type of float32, float64, int32 or int64. Either both or neither of x and y should be given.
         name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None.
@@ -583,22 +583,22 @@ def where(condition, x=None, y=None, name=None):
 
     Examples:
         .. code-block:: python
-          :name:where-example
+            :name:where-example
 
-          import paddle
+            import paddle
 
-          x = paddle.to_tensor([0.9383, 0.1983, 3.2, 1.2])
-          y = paddle.to_tensor([1.0, 1.0, 1.0, 1.0])
-          out = paddle.where(x>1, x, y)
+            x = paddle.to_tensor([0.9383, 0.1983, 3.2, 1.2])
+            y = paddle.to_tensor([1.0, 1.0, 1.0, 1.0])
+            out = paddle.where(x>1, x, y)
 
-          print(out)
-          #out: [1.0, 1.0, 3.2, 1.2]
+            print(out)
+            #out: [1.0, 1.0, 3.2, 1.2]
 
-          out = paddle.where(x>1)
-          print(out)
-          #out: (Tensor(shape=[2, 1], dtype=int64, place=CPUPlace, stop_gradient=True,
-          #            [[2],
-          #             [3]]),)
+            out = paddle.where(x>1)
+            print(out)
+            #out: (Tensor(shape=[2, 1], dtype=int64, place=CPUPlace, stop_gradient=True,
+            #            [[2],
+            #             [3]]),)
     """
     if np.isscalar(x):
         x = paddle.full([1], x, np.array([x]).dtype.name)