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<FONT><h3>Embedding</h3>
<p>We will now talk about how to embed Python inside other programs. Python offers a clean interface that allows embedding to occur.</p>
<P>You might be asking yourself why would you want to do it. Well, the answer is quite simple; as a scripting language, Python can wire its interpreter into other programs to enable you to make calls to specific Python functions and execute particular Python statements from them.</P>
<P>Those programs will have the capability to load Python scripts and execute Python services that belong to specific Python modules. You can also call Python functions directly from your C code and access the Python objects that are returned by them.</P>
<p>In order to embed Python inside a program, you just need to use the Python API梩he Python <tt cLASS="monofont">EXE</tt> is not necessary.<a nAME="idx1073744114"></A><a name="idx1073744115"></a><a name="idx1073744116"></a><a name="idx1073744117"></a><a nAme="idx1073744118"></A><a naMe="idx1073744119"></a><a nAme="idx1073744120"></a><A NAMe="idx1073744121"></a><a nAME="idx1073744122"></A><a namE="idx1073744123"></A><A Name="idx1073744124"></a><A NAMe="idx1073744125"></a></p>
<h4>Implementing Callback Functions</h4>
<p>Embedding Python allows you to access and use the Python interpreter from inside your application. But what happens if you need to call back your application functions from inside Python?</p>
<p>For this reason, it is a good practice to provide a module written in C that exposes an API related to the application. Therefore, when embedding Python within your routines, you can make your application communicate both ways with your Python program by accessing the Python extension modules.<a name="idx1073744126"></a><a name="idx1073744127"></a><A naMe="idx1073744128"></a></p>
<H4>Embedding the Python Interpreter</h4>
<p>The next example adds Python functionality to a C program.</p>
<pRe>
// File: embedding.c
#include <stdio.h>
#include <Python.h>
int main(int argc, char **argv)
{
Py_Initialize();
PyRun_SimpleString("print 'Hello Python World'");
printf("You are my visitor number %i", args);
Py_Finalize();
return(0);
}
</prE>
<P>Python provides a set of function calls that provide an interface to the Python interpreter. The most important ones are</P>
<Ul>
<li><p><TT CLass="monofont">Py_Initialize⌨️ 快捷键说明
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