C#调用pyd
<p>python打包成pyd在本篇博客不多叙述，请读者自行百度，本篇博客主要讲解在C#中如何调用pyd以及遇到的一些问题如何解决。</p><h2 id="1安装pythonnet">1.安装pythonnet</h2>
<p>pythonnet是一个强大的工具包，用于C#代码与python代码进行交互，不仅可以实现在C#中调用python，也可以实现在python中调用C#.</p>
<p>GitHub：https://github.com/pythonnet/pythonnet</p>
<ul>
<li>首先打开nuget包管理器：<br>
<img src="https://img-blog.csdnimg.cn/20200928133312731.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"></li>
<li>根据你python的版本下载对应的pythonnet，笔者使用的是python3.6，所以下载的是py36。<br>
<img src="https://img-blog.csdnimg.cn/20200928133841353.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"></li>
</ul>
<h2 id="2调用pyd中的模块">2.调用pyd中的模块</h2>
<ul>
<li>首先引用pythonnet：</li>
</ul>
<pre><code class="language-csharp">using Python.Runtime;
</code></pre>
<ul>
<li>调用pyd的模块：</li>
</ul>
<pre><code class="language-csharp">//All calls to python should be inside a using (Py.GIL()) {/* Your code here */} block.
using (Py.GIL())
{
//Import python modules using dynamic mod = Py.Import("mod"), then you can call functions as normal.
//All python objects should be declared as dynamic type.
dynamic np = Py.Import("test_pyd");
np.hello();
Console.ReadKey();
}
</code></pre>
<p><img src="https://img-blog.csdnimg.cn/20200928141856982.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"></p>
<ul>
<li>python代码：</li>
</ul>
<pre><code class="language-python">def hello():
print("Hello world")
</code></pre>
<h2 id="3可能出现的问题及解决方案">3.可能出现的问题及解决方案</h2>
<ul>
<li>环境变量的配置，环境变量的对应路径的python版本需要与你下载的pythonnet包版本是相同的：<br>
<img src="https://img-blog.csdnimg.cn/2020092814013219.png#pic_center"><br>
笔者电脑中有不同版本的python，经过笔者测试后发现更换版本最简单的方式是替换环境变量的顺序，笔者是在win10系统下进行的测试，其他系统未进行过测试。<br>
另外要注意你的pyd如果是使用64位编译的，则环境变量对应的python版本也需要是64位的。<br>
当python368在上时：<br>
<img src="https://img-blog.csdnimg.cn/20200928140527881.png#pic_center"><br>
当python378在上时：<br>
<img src="https://img-blog.csdnimg.cn/20200928140711432.png#pic_center"></li>
<li>System.DllNotFoundException:“无法加载 DLL“python36”: 找不到指定的模块。<br>
<img src="https://img-blog.csdnimg.cn/20200928142354156.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"><br>
解决方案：将python文件夹中的python36.dll复制到debug目录下<br>
<img src="https://img-blog.csdnimg.cn/20200928142636921.png#pic_center"></li>
<li>Python.Runtime.PythonException:“ModuleNotFoundError : No module named 'test_pyd'”</li>
</ul>
<p><img src="https://img-blog.csdnimg.cn/20200928142943491.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"><br>
解决方案：将test_pyd.pyd放入debug目录下<br>
<img src="https://img-blog.csdnimg.cn/2020092814330032.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"></p>
<ul>
<li>System.MissingMethodException:“Method not found: 'System.Reflection.Emit.AssemblyBuilder System.AppDomain.DefineDynamicAssembly(System.Reflection.AssemblyName, System.Reflection.Emit.AssemblyBuilderAccess)'.”<br>
<img src="https://img-blog.csdnimg.cn/20200928143454991.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"><br>
解决方案：该问题是由于.NET框架所导致的，笔者在使用.NET Core 3.1的时候就会出现这个错误，更换为.NET Framework 4.7.2后问题解决。<br>
<img src="https://img-blog.csdnimg.cn/20200928144031106.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"><br>
<img src="https://img-blog.csdnimg.cn/20200928144046834.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTk5MzgwOA==,size_16,color_FFFFFF,t_70#pic_center"></li>
</ul><br><br>
来源：https://www.cnblogs.com/degc/p/13995247.html
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