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Python調用Delphi寫的dll

Delphi單元如下（輸出hello.dll）：

unit hellofun;

interface

function getint():integer;stdcall;
function sayhello(var sname:PAnsiChar):PAnsiChar;stdcall;

implementation

function 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;

begin
end.

python中調用如下：

import ctypes

def 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()

運行Python，輸出如下：

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

好了，我們可以讓python完成部分功能在Delphi中調用，也可以用Delphi完成部分功能在Python中調用。