add comments for _extends\graph_kernel\expanders\addn.py

src/mindspore2022/mindspore/python/mindspore/_extends/graph_kernel/expanders/addn.py

@@ -13,20 +13,47 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for addn"""
+# 导入GraphKernelUnsupportedException异常类
 from mindspore._extends.graph_kernel.model.model import GraphKernelUnsupportedException as GKException
+# 导入Expander和ExpanderInfoValidator类
 from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
+# 使用VLD.check_all_formats_same装饰器，确保所有输入格式相同
 @VLD.check_all_formats_same
 class AddN(Expander):
     """Expand AddN to multiple Adds"""
 
+    # 检查输入数量是否大于1
     def _check(self):
+        """
+        检查输入的数量是否满足要求。
+
+        Args:
+            无
+
+        Returns:
+            无
+
+        Raises:
+            GKException: 如果输入的数量小于2，则抛出GKException异常。
+        """
         if len(self.inputs) < 2:
             raise GKException("For 'AddN', the inputs num should be greater than 1, but got {}"
                               .format(len(self.inputs)))
 
+    # 将AddN展开为多个Add操作
     def _expand(self, graph_builder):
+        """
+        对输入张量进行逐元素加法运算。
+
+        Args:
+            graph_builder (GraphBuilder): 图构建器对象，用于生成图节点。
+
+        Returns:
+            Tensor: 逐元素加法运算后的结果张量。
+
+        """
         result = self.inputs[0]
         for inp in self.inputs[1:]:
             result = graph_builder.emit('Add', [result, inp])