首先看下Delphi单元文件基本结构：

unit Unit1; //单元文件名 interface //这是接口关键字，用它来标识文件所调用的单元文件 uses //程序用到的公共单元 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs; type //这里定义了程序所用的组件，一些类，以及组件所对应的过程、事件 TForm1 = class(TForm) private //定义私有变量和私有过程 { Private declarations }public //定义公共变量和公共过程 { Public declarations }end; var //定义程序使用的公共变量 Form1: TForm1; implementation //程序代码实现部分 {$R *.dfm} end.

Delphi单元如下（输出hello.dll）：

unit hellofun;interfacefunction getint():integer;stdcall;function sayhello(var sname:PAnsiChar):PAnsiChar;stdcall;implementationfunction getint():integer;stdcall;begin result:=888;end;function sayhello(var sname:PAnsiChar):PAnsiChar;stdcall;begin sname:='ok!'; result:='hello,garfield !';end;end.library hello;{ Important note about DLL memory management: ShareMem must be the first unit in your library's USES clause AND your project's (select Project-View Source) USES clause if your DLL exports any procedures or functions that pass strings as parameters or function results. This applies to all strings passed to and from your DLL--even those that are nested in records and classes. ShareMem is the interface unit to the BORLNDMM.DLL shared memory manager, which must be deployed along with your DLL. To avoid using BORLNDMM.DLL, pass string information using PChar or ShortString parameters. }uses System.SysUtils, System.Classes, hellofun in 'hellofun.pas';{$R *.res}exports getint, sayhello;beginend.

python中调用如下：

import ctypesdef main(): dll=ctypes.windll.LoadLibrary("hello.dll") ri=dll.getint() print(ri) s=ctypes.c_char_p() rs=ctypes.c_char_p() rs=dll.sayhello(ctypes.byref(s)) print(s) print(ctypes.c_char_p(rs))if __name__ == '__main__': main()

运行Python，输出如下：

>>> 888c_char_p(b'ok!')c_char_p(b'hello,garfield !')>>>

好了，我们可以让python完成部分功能在Delphi中调用，也可以用Delphi完成部分功能在Python中调用。

以上程序在DelphiXE2及Python3.2中调试通过。

总结

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