473,792 Members | 2,831 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

SWIG char** to Python list

Hi

I have a C function that builds a list of null terminated strings:
void buildStringList (char **asStrings, int n);
The number of elements in the list is given in input.

I'd like to have this function available in Python.
I use SWIG but I'm a complete newbie with it.
I've only found an example to convert a Python list to C char**
http://www.swig.org/Doc1.3/Python.html#Python_nn59

I naively replaced typemap(in) by typemap(out) but it doesn't work :
TypeError: argument number 1: a 'char **' is expected, 'list([])' is
received

Do I have to learn more of SWIG or is there a simple way to make my C
function fill a list of Python objects?

Regards
Chris
Jul 19 '05 #1
0 1595

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

0
1642
by: Andrew Collier | last post by:
hello, i am not sure whether this problem relates to swig, python or my c++ compiler. +please forgive me if this is inappropriately posted but i am sure that someone +on this list must have some good ideas. i have also sent i to the swig users list a couple of times but have not got any response so i am casting my net a little wider... i have been struggling with the following problem for a couple of days now. +specifically, i have a...
3
3517
by: Lars Moastuen | last post by:
Im trying to extend a class written in C++ in Python and use this extended class in a C++ call... I made an example to clarify: -- Foo.h -- #ifndef FOO_H #define FOO_H #include <iostream> using namespace std;
1
2162
by: Java and Swing | last post by:
I am trying to wrap some C code I have. Currently I have something like... defs.h ----------- typedef unsigned long MY_DIGIT; myapp.c ------------- void MakeDigits(MY_DIGIT digits) {
0
1056
by: Java and Swing | last post by:
When I try to print an object in Python, python.exe crashes. Below are my files. defs.h ------------------------------------------------------------------------------------------------------ typedef unsigned long MY_DIGIT; myapp.c ------------------------------------------------------------------------------------------------------
3
3144
by: Java and Swing | last post by:
I've tried sending a email to the swig mailing list 3 times...but it never seems to get it...not sure what is going on, still looking into it. Until then... I now have a C function such as... int doIt(char *a, MY_DIGIT **digit) { ... }
2
4454
by: ajikoe | last post by:
Hi, I tried to follow the example in swig homepage. I found error which I don't understand. I use bcc32, I already include directory where my python.h exist in bcc32.cfg. /* File : example.c */ #include <time.h>
1
3264
by: cody314 | last post by:
Versions: Python 2.5.1 (r251:54863, May 14 2007, 10:50:04) SWIG Version 1.3.20 Hello I have some code that wraps a C++ library so I may use it in python. The code basically just gets some data and puts it in the PyArrayObject* which is returned as a PyObject*. I then call it from python like so: self.c = __f2.fdct2_wrapper(x,self.nbs,self.nba,self.ac)
0
1604
by: newbie73 | last post by:
Going through the tutorial on http://swig.org, I created the example files (pasted below). After generating the _wrap file, I tried compiling (using mingw32) and received a lot of undefined reference compiler errors: ...\build\temp.win32-2.5\Release\example_wrap.o:example_wrap.c:(.text+0x670f): undefined reference to `_imp__PyExc_MemoryError' there are many other similar errors all prefaced with _imp__Py, so I am assuming there is a...
1
1665
by: Sells, Fred | last post by:
I'm using python 2.4 under linux (centos 5.1). I need to pass an array of doubles to a c function but am getting an error, shown near the bottom of this post. ---------------------------------------------------- my swig interface file looks like this * File: rug520.i */ %module rug520 %include "typemaps.i"
0
9518
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10430
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10211
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
7538
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6776
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5436
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
5560
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4111
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
3
2917
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.