!12535 add raises description for Cast, Diag, Eye, Fill etc. operators

From: @wangshuide2020
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

mindspore/ops/operations/image_ops.py

@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -53,6 +53,11 @@ class CropAndResize(PrimitiveWithInfer):
     Outputs:
         A 4-D tensor of shape [num_boxes, crop_height, crop_width, depth] with type: float32.
 
+    Raises:
+        TypeError: If `method` is not a str.
+        TypeError: If `extrapolation_value` is not a float.
+        ValueError: If `method` is not one of 'bilinear', 'nearest', 'bilinear_v2'.
+
     Supported Platforms:
         ``Ascend``
 

tests/ut/python/ops/test_math_ops.py

@@ -111,10 +111,10 @@ def test_pow():
 
 def test_exp():
     """ test_exp """
-    input_tensor = Tensor(np.array([[2, 2], [3, 3]]))
+    input_tensor = Tensor(np.array([[2, 2], [3, 3]], np.float32))
     testexp = P.Exp()
     result = testexp(input_tensor)
-    expect = np.exp(np.array([[2, 2], [3, 3]]))
+    expect = np.exp(np.array([[2, 2], [3, 3]], np.float32))
     assert np.all(result.asnumpy() == expect)