笔者做了个神经网络模型，使用pytorch构建模型，并使用matplotlib显示相关信息，过程中出现如下错误

OMP: Error #15: Initializing libiomp5md.dll, but found libiomp5md.dll already initialized.
OMP: Hint This means that multiple copies of the OpenMP runtime have been linked into the program. That is dangerous, since it can degrade performance or cause incorrect results. The best thing to do is to ensure that only a single OpenMP runtime is linked into the process, e.g. by avoiding static linking of the OpenMP runtime in any library. As an unsafe, unsupported, undocumented workaround you can set the environment variable KMP_DUPLICATE_LIB_OK=TRUE to allow the program to continue to execute, but that may cause crashes or silently produce incorrect results. 

修复该错误需要设置系统环境变量KMP_DUPLICATE_LIB_OK=TRUE 

如下：

import os
os.environ['KMP_DUPLICATE_LIB_OK']='True'

报错消失