【pytorch环境】Initializing libiomp5md.dll, but found libiomp5md.dll already initialized.错误解决方法

一、说明

        这是一个很典型的python包重复，冲突造成的错误。本案例表现为：在conda和pytorch下都存在libiomp5md.dll，因而出现二意性无法继续，本篇如实记录解决过程。

二、遇到问题描述双重包调用是普遍的

2.1 库包含关系

        在处理torch程序中，有如下包含：

import torch
from torch import nn
from d2l import torch as d2l
import torchvision
from torch.utils import data
from torchvision import transforms

        调用该程序，无语法错误，但后面出现：

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,