Source.Python forums

Hello,

I'm trying to extend SP with a C++ addon. The following exception is thrown:


I really don't know why this happens. In my opinion, I followed everything described on https://docs.python.org/3/extending/embedding.html#extending-embedded-python
The module is definitely loaded. When I don't load my C++ stuff, the normal 'no module named blah' error appears.

The necessary code is:

I'm thankful for help.

My guess is that the exception is throw by the following line:

Most likely since you declare your module as "emb":

Rename the function to PyInit_pawnbridge and it should works just fine.

This does not change anything. Of course it does not, since this is only the internal symbol name. Python doesn't care about them. Thanks anyway :-)

Your statement makes sense if considering the following sentence (same link as yours):

and should be the only non-static item defined in the module file:

Code: Select all

PyMODINIT_FUNC
PyInit_spam(void)
{
    return PyModule_Create(&spammodule);
}

This is ok, since PyMODINIT_FUNC translates to an exporting function. Problem is, it is still not working.
I also tried using boost.python and compiled against 3.4, but it still doesn't work. Visual Studio still wants to link against the static version (libboost_python-vc120-mt-s-1_55.lib) but I set BOOST_ALL_DYN_LINK in the compiler options...

I think the problem is that you are trying to initialize another Python interpreter. I have updated an old Python 2 extension to test extending Python 3. Here is all I did to get it working. https://code.google.com/p/symdump/source/detail?r=3

Hi,

this is out of the official documentation where they are saying "extending an embedded python". As for Python 2, you had to call the Py_Initialize() from extending libraries too. Even removing it, it does not change anything. Your code sample looks nearly the same as the code above. I am confused.

I'll try to use boost.python.

Edit: worked. My code is: Do you have an idea how to initialize the module? I'm very new to boost.python.

What happens when you remove the line L'In20Cible pointed out?[python]PyImport_AppendInittab("pawnbridge", &PyInit_emb);[/python]

This should already initialize the module.

Nothing happens if I remove that line.
Well, it does not initialize it. It now says "no module named pawnbridge". I'm unsure whether it's possible to extend a given boost.python instance with another library.

Where did you place the extension and how does your import line looks like?

This is a SourceMod extension. It is loaded after Source.Python is loaded.

Testscript is (from boost.python now). It is under plugins/pbtest/pbtest.py.

Well, that complicates things.

Is your extension on the search path?

In co-work with your-name-here, I debugged a little bit. This is what comes out: (bigger: http://img.unsuspicious.de/c5c33.png)
You see that this is definitely the same python instance running. Guess, it doesn't work either.

That's good news! Can you import modules of Source.Python (_events, _memory, etc.)? https://docs.python.org/3.4/c-api/import.html#c.PyImport_ImportModule

Yes, works: http://img.r4nz.de/d2565.png
I guess the way is right that it doesn't lookup my dll for PyInit_pawnbridge, but adding it to sys.path doesn't seem the solution.

Have you tried to call PyInit_pawnbridge manually? You can also try to add a module like we do in Source.Python. https://github.com/Source-Python-Dev-Team/Source.Python/blob/master/src/core/modules/export_main.cpp#L74

Yes, that's why you need to call your initialization function.

def() is the function which can be used to expose C++ functions and callable objects as Python functions in the current scope.

I call the init func. It doesn't work.
I also tried:
But it has no effect :/

Could you please post the current code?