用c为python写个简单的模块

妖狐艹你老母 2022-04-13 05:16 178阅读 0赞

# [用c为python写个简单的模块][c_python][\[复制链接\]][c_python] #

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     <div> 电梯直达  
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       <em>发表于 2008-8-15 09:12:11</em> 
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          <td>python语言是支持用c来它写模块的，其实现有的很多模块也是用c写的。这里我做个简单的介绍。<br> <br> 先决条件：<br> 1.在linux上编写，需要自己编译出python的动态连接库。也就是要有libpython2.5.so这样的东西。<br> 2.在windows上，则需要mingw这个编译环境。其实只要你安装了Dev-Cpp就有了。当然还安装了windows版的python.<br> <br> 先把源代码帖上来，很简单，假设保存为 hello.c 
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             <ol> 
              <li>#include &lt;Python.h&gt;<br> </li> 
              <li><br> </li> 
              <li>static PyObject *<br> </li> 
              <li>hello_echo(PyObject *self, PyObject *args, PyObject *keywds)<br> </li> 
              <li>{&nbsp;&nbsp;<br> </li> 
              <li>&nbsp; &nbsp; char&nbsp; &nbsp; *something;<br> </li> 
              <li><br> </li> 
              <li>&nbsp; &nbsp; if (!PyArg_ParseTuple(args, "s", &amp;something))<br> </li> 
              <li>&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;return NULL; <br> </li> 
              <li>&nbsp; &nbsp; <br> </li> 
              <li>&nbsp; &nbsp; printf("%s\n", something);<br> </li> 
              <li>&nbsp; &nbsp; Py_INCREF(Py_None);<br> </li> 
              <li>&nbsp; &nbsp; return Py_None;<br> </li> 
              <li>}<br> </li> 
              <li><br> </li> 
              <li>static PyMethodDef hello_methods[] = { <br> </li> 
              <li>&nbsp; &nbsp; {"echo", (PyCFunction)hello_echo, METH_VARARGS | METH_KEYWORDS, "print string"},<br> </li> 
              <li>&nbsp; &nbsp; {NULL, NULL, 0, NULL}<br> </li> 
              <li>};<br> </li> 
              <li><br> </li> 
              <li>void<br> </li> 
              <li>inithello(void)<br> </li> 
              <li>{ <br> </li> 
              <li>&nbsp; &nbsp; Py_InitModule("hello", hello_methods);<br> </li> 
              <li>}</li> 
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            <em>复制代码</em> 
           </div> 先说说在linux怎么编译它：<br> 很简单，只需要一个命令，<br> gcc -shared -fPIC hello.c -I/usr/include/python2.5/ -L/usr/lib -lpython2.5 -o hello.so<br> <br> 就可以生成 hello.so 。注意这里-I/usr/include/python2.5/ 是python的头文件路径，有可能你的在-I/usr/local/include/python2.5/，<br> -L/usr/lib 是python的libpython2.5.so在哪里，有可能你的在-L/usr/local/lib，这个都根据实际情况。<br> 来测试测试，在hello.so的当前路径下：<br> <br> [zhaowei@papaya python]$ python<br> Python 2.5 (r25:51908, Jan 15 2007, 09:14:22)<br> [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2<br> Type "help", "copyright", "credits" or "license" for more information.<br> &gt;&gt;&gt; import hello<br> &gt;&gt;&gt; hello.echo("hehe, hello")<br> hehe, hello<br> &gt;&gt;&gt;<br> <br> <br> 再来说说在windows下怎么编译。你必须安装有mingw，简单来说安装有Dev-Cpp，然后把它安装目录下的bin目录加到环境变量的PATH里。<br> 比如我的就是把D:\Dev-Cpp\bin加到PATH里。<br> 开始了，打开命令行窗口，到hello.c所在目录，也运行一个命令，<br> gcc -shared hello.c -IC:\Python25\include -LC:\Python25\libs -lpython25 -o hello.pyd<br> 就会在当前目录下生成一个hello.pyd的文件。</td> 
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