quote="Hanshize, post:1, topic:985, full:true"
1 系统环境
硬件环境(Ascend/GPU/CPU): CPU MindSpore版本: 1.9 执行模式: 静态图 Python版本: 3.7.5 操作系统平台: linux
2 报错信息
2.1 问题描述
有一个模型,在construct里进行了一些计算,计算完毕后想删除某个tensor
2.2 报错信息
arduino
Traceback (most recent call last):
File "D:/cons.py", line 11, in <module>
m(1, 2)
File "D:\python3.7\lib\site-packages\mindspore\nn\cell.py", line 622, in __call__
out = self.compile_and_run(*args)
File "D:\python3.7\lib\site-packages\mindspore\nn\cell.py", line 1007, in compile_and_run
self.compile(*inputs)
File "D:\python3.7\lib\site-packages\mindspore\nn\cell.py", line 979, in compile
jit_config_dict=self._jit_config_dict)
File "D:\python3.7\lib\site-packages\mindspore\common\api.py", line 1147, in compile
result = self._graph_executor.compile(obj, args_list, phase, self._use_vm_mode())
RuntimeError: Unsupported statement 'Delete'.
More details please refer to syntax support at https://www.mindspore.cn
----------------------------------------------------
- The Traceback of Net Construct Code:
----------------------------------------------------
# In file D:/cons.py:9
del a
^
----------------------------------------------------
- C++ Call Stack: (For framework developers)
----------------------------------------------------
mindspore\ccsrc\pipeline\jit\parse\parse.cc:772 mindspore::parse::Parser::ParseStatement
Process finished with exit code 1
2.3 脚本代码
python
from mindspore import nn
import mindspore as ms
ms.set_context(mode=ms.GRAPH_MODE)
class Model(nn.Cell):
def construct(self, x, y):
a = x + 1
y = a + y
del a
return y
m = Model()
m(1, 2)
3 根因分析
在Graph模式下,Python代码并不是由Python解释器去执行,而是将代码编译成静态计算图,然后执行静态计算图。 由于语法解析的限制,当前在编译构图时,支持的数据类型、语法以及相关操作并没有完全与Python语法保持一致,部分使用受限。 具体参考:静态图语法支持 | MindSpore 1.8 文档 | 昇思MindSpore社区 出错的代码 gitee.com/mindspore/m...
从说明文档和代码上都能看出del不被支持
4 解决方案
不用del,将变量置None
ini
from mindspore import nn
import mindspore as ms
ms.set_context(mode=ms.GRAPH_MODE)
class Model(nn.Cell):
def construct(self, x, y):
a = x + 1
y = a + y
a = None
return y
m = Model()
m(1, 2)
/quote