!4058 modify parameter input

Merge pull request !4058 from lijiaqi/cell_inputs

mindspore/nn/cell.py

@@ -383,9 +383,13 @@ class Cell:
             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: {}.'.
-                             format(len(inputs), self._construct_inputs_num))
+        # judge if *args exists in input
+        if self.argspec[1] is not None:
+            prefix = self.argspec[1]
+            for i in range(len(inputs)):
+                key = prefix + str(i)
+                self._construct_inputs_names = self._construct_inputs_names + (key,)
+                self._construct_inputs_num = self._construct_inputs_num + 1
         for i, tensor in enumerate(inputs):
             key = self._construct_inputs_names[i]
             # if input is not used, self.parameter_layout_dict may not contain the key
@@ -412,7 +416,7 @@ class Cell:
         from mindspore._extends.parse.parser import get_parse_method_of_class
 
         fn = get_parse_method_of_class(self)
-        inspect.getfullargspec(fn)
+        self.argspec = inspect.getfullargspec(fn)
         self._construct_inputs_num = fn.__code__.co_argcount
         self._construct_inputs_names = fn.__code__.co_varnames
 

mindspore/nn/optim/momentum.py

@@ -41,7 +41,7 @@ def _tensor_run_opt_ext(opt, momentum, learning_rate, gradient, weight, moment,
 
 
 class Momentum(Optimizer):
-    """
+    r"""
     Implements the Momentum algorithm.
 
     Refer to the paper on the importance of initialization and momentum in deep learning for more details.

mindspore/nn/optim/sgd.py

@@ -32,7 +32,7 @@ def _tensor_run_opt_ext(opt, momentum, learning_rate, gradient, weight, accum, s
 
 
 class SGD(Optimizer):
-    """
+    r"""
     Implements stochastic gradient descent (optionally with momentum).
 
     Introduction to SGD can be found at https://en.wikipedia.org/wiki/Stochastic_gradient_descent.

mindspore/nn/wrap/cell_wrapper.py

@@ -82,7 +82,7 @@ class WithGradCell(Cell):
 
     Wraps the network with backward cell to compute gradients. A network with a loss function is necessary
     as argument. If loss function in None, the network must be a wrapper of network and loss function. This
-    Cell accepts data and label as inputs and returns gradients for each trainable parameter.
+    Cell accepts *inputs as inputs and returns gradients for each trainable parameter.
 
     Note:
         Run in PyNative mode.
@@ -95,8 +95,7 @@ class WithGradCell(Cell):
             output value. Default: None.
 
     Inputs:
-        - **data** (Tensor) - Tensor of shape :math:`(N, \ldots)`.
-        - **label** (Tensor) - Tensor of shape :math:`(N, \ldots)`.
+        - **(*inputs)** (Tuple(Tensor)) - Tuple of input tensors with shape :math:`(N, \ldots)`.
 
     Outputs:
         list, a list of Tensors with identical shapes as trainable weights.
@@ -126,12 +125,12 @@ class WithGradCell(Cell):
             self.network_with_loss = WithLossCell(self.network, self.loss_fn)
         self.network_with_loss.set_train()
 
-    def construct(self, data, label):
+    def construct(self, *inputs):
         weights = self.weights
         if self.sens is None:
-            grads = self.grad(self.network_with_loss, weights)(data, label)
+            grads = self.grad(self.network_with_loss, weights)(*inputs)
         else:
-            grads = self.grad(self.network_with_loss, weights)(data, label, self.sens)
+            grads = self.grad(self.network_with_loss, weights)(*inputs, self.sens)
         return grads
 
 
@@ -139,7 +138,7 @@ class TrainOneStepCell(Cell):
     r"""
     Network training package class.
 
-    Wraps the network with an optimizer. The resulting Cell be trained with input data and label.
+    Wraps the network with an optimizer. The resulting Cell be trained with input *inputs.
     Backward graph will be created in the construct function to do parameter updating. Different
     parallel modes are available to run the training.
 
@@ -149,8 +148,7 @@ class TrainOneStepCell(Cell):
         sens (Number): The scaling number to be filled as the input of backpropagation. Default value is 1.0.
 
     Inputs:
-        - **data** (Tensor) - Tensor of shape :math:`(N, \ldots)`.
-        - **label** (Tensor) - Tensor of shape :math:`(N, \ldots)`.
+        - **(*inputs)** (Tuple(Tensor)) - Tuple of input tensors with shape :math:`(N, \ldots)`.
 
     Outputs:
         Tensor, a scalar Tensor with shape :math:`()`.
@@ -181,11 +179,11 @@ class TrainOneStepCell(Cell):
             degree = _get_device_num()
             self.grad_reducer = DistributedGradReducer(optimizer.parameters, mean, degree)
 
-    def construct(self, data, label):
+    def construct(self, *inputs):
         weights = self.weights
-        loss = self.network(data, label)
+        loss = self.network(*inputs)
         sens = P.Fill()(P.DType()(loss), P.Shape()(loss), self.sens)
-        grads = self.grad(self.network, weights)(data, label, sens)
+        grads = self.grad(self.network, weights)(*inputs, sens)
         if self.reducer_flag:
             # apply grad reducer on grads
             grads = self.grad_reducer(grads)