!81 add operator IsFinite input parameter verification

Merge pull request !81 from yanzhenxiang2020/fix_isfinite_input_check

mindspore/ops/operations/math_ops.py

@@ -1656,6 +1656,8 @@ class IsFinite(PrimitiveWithInfer):
         return x_shape
 
     def infer_dtype(self, x_dtype):
+        validator.check_subclass("x", x_dtype, mstype.tensor, self.name)
+        validator.check_tensor_type_same({'x': x_dtype}, mstype.number_type + (mstype.bool_,), self.name)
         return mstype.bool_
 
 class FloatStatus(PrimitiveWithInfer):