MindSpore报错 sth should be initialized as a Parameter type in ...-优快云博客

本文链接：https://blog.youkuaiyun.com/huodagu/article/details/129139651

在MindSpore中，网络类的变量需要在__init__方法中使用Parameter进行初始化，不能直接在construct函数中赋值。错误信息表明self.val应被初始化为Parameter类型。解决方法是将self.val定义为Parameter，如`self.val=Parameter(Tensor(1.0,ms.float32),name=var)`。

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系统环境

Hardware Environment(Ascend/GPU/CPU): ALL Software Environment: MindSpore version (source or binary): 1.6.0 & Earlier versions Python version (e.g., Python 3.7.5): 3.7.6 OS platform and distribution (e.g., Linux Ubuntu 16.04): Ubuntu GCC/Compiler version (if compiled from source): gcc 9.4.0

python代码样例

在网络中定义一个参数，并在训练过程中更新值，如下：

from mindspore import nn, Tensor, Parameter
import numpy as np

classNet(nn.Cell):def__init__(self):
        super(Net, self).__init__()
        self.val = 2.0defconstruct(self, x):
        self.val = x
        return0

net = Net()
output = net(1.0)
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执行代码发现报错。

报错信息

Traceback (most recent call last):
  File "test_var.py", line 15, in <module>
    output = net(1.0)
  File "C:\Users\46638\miniconda3\envs\mindspore\lib\site-packages\mindspore\nn\cell.py", line 477, in __call__
    out = self.compile_and_run(*args)
  File "C:\Users\46638\miniconda3\envs\mindspore\lib\site-packages\mindspore\nn\cell.py", line 803, in compile_and_run
    self.compile(*inputs)
  File "C:\Users\46638\miniconda3\envs\mindspore\lib\site-packages\mindspore\nn\cell.py", line 790, in compile
    _cell_graph_executor.compile(self, *inputs, phase=self.phase, auto_parallel_mode=self._auto_parallel_mode)
  File "C:\Users\46638\miniconda3\envs\mindspore\lib\site-packages\mindspore\common\api.py", line 632, in compile
    result = self._graph_executor.compile(obj, args_list, phase, self._use_vm_mode())
TypeError: mindspore\ccsrc\pipeline\jit\parse\parse.cc:1923 HandleAssignClassMember] 'self.val' should be initialized as a 'Parameter'typein the '__init__' function, but got '2.0' with type'float.

In file test_var.py(11)
        self.val = x
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原因分析

报错信息提示，变量self.val不支持在construct函数中直接赋值，需要使用Parameter进行初始化。此时可以查询mindspore官网中Parameter接口的使用说明。

在样例中发现，参数需要在__init__方法中初始化。

解决方法

from mindspore import nn, Tensor, Parameter
import mindspore as ms
import numpy as np

classNet(nn.Cell):def__init__(self):
        super(Net, self).__init__()
        self.val = Parameter(Tensor(1.0, ms.float32), name="var")

    defconstruct(self, x):
        self.val = x
        return0

net = Net()
output = net(Tensor(2.0, ms.float32))
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