使用C编写的dll扩展python [英] extending python with a C-written dll
问题描述
我正试图让一个可以通过python脚本访问的Windows DLL ...和
我在遇到麻烦期间链接步骤..
我使用lcc编译和链接
我在win XP下使用python 2.3
这里的编译命令似乎运行良好：
------------------------------------------------ -----
lcclnk.exe -entry inithello -dll -o hello.dll hello.obj -L
" C：\ python23 \ libs" python23.lib
这里的链接命令失败：
--------------------- ---------------
lcclnk.exe -entry inithello -dll -o hello.dll hello.obj -L
" ; C：\python23\libs" python23.lib
以下是错误：
---------------------
错误c：\ ... \plugins \ hello.c 14对__imp__Py_BuildValue的未定义引用
错误c：\ ... \plugins \ hello.c 46 undefined引用__imp__Py_InitModule4
这里是编译但不链接的C代码：
------------- -------------------------------------
＃ include< Python.h>
PyObject * helloHello（PyObject * self，PyObject * args）
{
printf（ Hello World！;;
返回Py_BuildValue（" i"，1）;
}
PyObject * helloHelloString（PyObject * self，PyObject * args）
{
返回Py_BuildValue（" s"，Hello World！）;
}
static char MHello__doc __ [] ="这是一个简单的Python C扩展示例" ;;
static char Hello__doc __ [] ="打印在console" ;;
static char HelloString__doc __ [] ="返回消息为字符串" ;;
PyMethodDef helloMethods [] = {
{" Hello"，helloHello，METH_VARARGS，Hello__doc__}，
{" HelloString"，helloHelloString，METH_VARARGS，HelloString__doc__}，
{NULL，NULL}
};
void __declspec（dllexport）inithello（）
{
（void）Py_InitModule3（ hello，helloMethods，MHello__doc__）;
}
任何人都可以帮助我吗？
2004-12-20，Jean-Baptiste PERIN< jb ****** @ yahoo.fr>写道：
我正在尝试从python脚本中获取一个windows dll ..
FWIW，你可以使用ctypes模块调用dll'，而不会在C中乱码。可能有性能原因构建
a" real" python模块，但我还没碰到它们。
-
Grant Edwards grante哇！我KAISER ROLL？！什么
好的是凯撒卷
visi.com没有一点COLE SLAW
在SIDE上？
给Edwards一个écrit：2004-12-20，Jean-Baptiste PERIN< jb ****** @ yahoo.fr>写道：
我正在尝试从python脚本中获取一个windows dll ..
FWIW，你可以使用ctypes模块调用dll'，而不会在C中乱码。可能有性能原因需要构建一个真实的模块。 python模块，但我还没碰到它们。
不是真正的性能原因..但主要是因为我有一个巨大的代码
用C生成，没有时间在python中移植它。
此外..我需要python程序与C代码交互
...（ perfom调用dll定义的函数）
我不知道ctypes模块..你真的认为它可以帮助吗？
你有吗？链接以快速了解它？
我发现的唯一的事情是：
http://www.python.org/workshops/1994...Classes_5.html
2004-12-20，Jean-Baptiste PERIN< jb ****** @ yahoo.fr>写道：
我正在尝试从python脚本访问一个Windows DLL ..
FWIW，您可以使用ctypes模块调用dll'，而不会在C中乱码。可能有性能原因需要构建真实模块。 python模块，但我还没碰到它们。
不是真正的性能原因..但主要是因为我有一个用C生成的巨大代码而没有是时候把它移植到python中了......
而且..我需要python程序与C
代码交互..（perfom调用dll定义的函数）
我不知道ctypes模块..你真的认为它有用吗？
它可以让你轻松调用DLL中的函数。
你有快速了解它的链接吗？
http://starship.python.net / crew / theller / ctypes /
http://starship.python.net/crew/thel.../tutorial.html
我发现的唯一一件事是：
http://www.python.org/workshops/1994...Classes_5。 html
我认为这是无关的。
-
格兰特爱德华兹格兰特哇！我有一条毛巾。
at
visi.com
Hi,
I''m trying to make a windows dll reachable from a python script .. and
I''m encountering troubles during link step ..
I use "lcc" to compile and link
I use python 2.3 under win XP
Here''s the compile command which seems to work well :
-----------------------------------------------------
lcclnk.exe -entry inithello -dll -o hello.dll hello.obj -L
"C:\python23\libs" python23.lib
Here''s the link command which fails:
------------------------------------
lcclnk.exe -entry inithello -dll -o hello.dll hello.obj -L
"C:\python23\libs" python23.lib
Here are the errors :
---------------------
Error c:\...\plugins\hello.c 14 undefined reference to __imp__Py_BuildValue
Error c:\...\plugins\hello.c 46 undefined reference to __imp__Py_InitModule4
Here''s the C code which compile but does not link :
--------------------------------------------------
#include <Python.h>
PyObject *helloHello(PyObject *self, PyObject *args)
{
printf("Hello World!");
return Py_BuildValue("i", 1);
}
PyObject *helloHelloString(PyObject *self, PyObject *args)
{
return Py_BuildValue("s", "Hello World!");
}
static char MHello__doc__[] = "This is a simple Python C extension example";
static char Hello__doc__[] = "Prints in the console";
static char HelloString__doc__[] = "Returns message as string";
PyMethodDef helloMethods[] = {
{"Hello", helloHello, METH_VARARGS, Hello__doc__},
{"HelloString", helloHelloString, METH_VARARGS, HelloString__doc__},
{NULL, NULL}
};
void __declspec(dllexport) inithello()
{
(void)Py_InitModule3("hello", helloMethods, MHello__doc__);
}
Can anyone help me?
On 2004-12-20, Jean-Baptiste PERIN <jb******@yahoo.fr> wrote:
I''m trying to make a windows dll reachable from a python script..
FWIW, you can call dll''s using the ctypes modules without
mucking around in C. There may be performance reasons to build
a "real" python module, but I haven''t run across them yet.
--
Grant Edwards grante Yow! I KAISER ROLL?! What
at good is a Kaiser Roll
visi.com without a little COLE SLAW
on the SIDE?
Grant Edwards a écrit :On 2004-12-20, Jean-Baptiste PERIN <jb******@yahoo.fr> wrote:I''m trying to make a windows dll reachable from a python script..
FWIW, you can call dll''s using the ctypes modules without
mucking around in C. There may be performance reasons to build
a "real" python module, but I haven''t run across them yet.
Not really a performance reason .. but mainly because I have a huge code
produced in C and no time to port it in python ..
Moreover .. I need the python program to interact with the C code
...(perfom calls to dll-defined functions)
I don''t know ctypes module .. do you really think it can help ?
Do you have a link to quickly learn about it ?
The only thing I found is :
http://www.python.org/workshops/1994...Classes_5.html
On 2004-12-20, Jean-Baptiste PERIN <jb******@yahoo.fr> wrote:
I''m trying to make a windows dll reachable from a python script..
FWIW, you can call dll''s using the ctypes modules without
mucking around in C. There may be performance reasons to build
a "real" python module, but I haven''t run across them yet.
Not really a performance reason .. but mainly because I have a
huge code produced in C and no time to port it in python ..
Moreover .. I need the python program to interact with the C
code ..(perfom calls to dll-defined functions)
I don''t know ctypes module .. do you really think it can help?
It lets you easily call functions in DLLs.
Do you have a link to quickly learn about it ?
http://starship.python.net/crew/theller/ctypes/
http://starship.python.net/crew/thel.../tutorial.html
The only thing I found is :
http://www.python.org/workshops/1994...Classes_5.html
I think that is unrelated.
--
Grant Edwards grante Yow! I HAVE a towel.
at
visi.com
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