!1087 add param_perfix to cell

Merge pull request !1087 from SanjayChan/03cell

mindspore/nn/cell.py

@@ -60,6 +60,7 @@ class Cell:
         self._cells = OrderedDict()
         self.training = False
         self.pynative = False
+        self._param_perfix = ''
         self._auto_prefix = auto_prefix
         self._scope = None
         self._phase = 'train'
@@ -83,6 +84,24 @@ class Cell:
     def cell_init_args(self):
         return self._cell_init_args
 
+    @property
+    def param_perfix(self):
+        """
+        Param perfix is the prfix of curent cell's direct child parameter.
+        """
+        return self._param_perfix
+
+    def update_cell_prefix(self):
+        """
+        Update the all child cells' self.param_prefix.
+
+        After invoked, can get all the cell's children's name perfix by '_param_perfix'.
+        """
+        cells = self.cells_and_names
+
+        for cell_name, cell in cells:
+            cell._param_perfix = cell_name
+
     @cell_init_args.setter
     def cell_init_args(self, value):
         if not isinstance(value, str):
@@ -223,7 +242,6 @@ class Cell:
         Args:
             params (dict): The parameters dictionary used for init data graph.
         """
-
         if params is None:
             for key in self.parameters_dict():
                 tensor = self.parameters_dict()[key].data
@@ -253,7 +271,6 @@ class Cell:
         Args:
             inputs (Function or Cell): inputs of construct method.
         """
-
         parallel_inputs_run = []
         if len(inputs) > self._construct_inputs_num:
             raise ValueError('Len of inputs: {} is bigger than self._construct_inputs_num: {}.'.