473,769 Members | 2,359 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

get the shape of a numpy ndarray in C++ code [boost.python]

[sorry is half a post appeared earlier. Bloody Google groups...]

Hello,

I'm trying to use a numpy array in C++ (win2000) using boost.python.

Test code:
void test( numeric::array& nsP)
{
object shape = nsP.getshape();
int rows = extract<int>(sh ape[0]);
int cols = extract<int>(sh ape[1]);
}

At first, running it in Python got me this message:

ArgumentError: Python argument types in
d3d.wr_conn(num py.ndarray)
did not match C++ signature:
wr_conn(class boost::python:: numeric::array {lvalue})

I fixed this using this line:

numeric::array: :set_module_and _type( "numpy", "ndarray");

[was that right?]
At least it got me one step further; the array is accepted. Now the
message is this:

AttributeError: 'numpy.ndarray' object has no attribute 'getshape'

Now I'm stumped. The only thing I can find is
http://www.thescripts.com/forum/showthread.php?t=644270

which regrettably ends with the same question. What's wrong here?

greets,
Marc

Nov 9 '07 #1
0 1426

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

Similar topics

3
2208
by: Duncan Smith | last post by:
Hello, Since moving to numpy I've had a few problems with my existing code. It basically revolves around the numpy scalar types. e.g. ------------------------------------------------ array(, ]) Traceback (most recent call last): File "<pyshell#30>", line 1, in -toplevel-
2
6039
by: TG | last post by:
Hi there. I'm strugling here with some boost python code (damn I hate C++) : All I want to do is to initialize the content of an array with a numpy ndarray parameter. I have this, which actually works. But I want to add some kind of data check such as : * is array two dimensional ? * are the dimensions corresponding to map's width / height ?
2
3422
by: devnew | last post by:
hi i am looking for some info about mapping btw values in an array and corresponding columns of a matrix i have an numpy array= and a numpy matrix object= matrix((, , , ))
2
2785
by: Travis Oliphant | last post by:
I wanted to point anybody interested to a blog post that describes a useful pattern for having a NumPy array that points to the memory created by a different memory manager than the standard one used by NumPy. The pattern shows how to create a NumPy array that points to previously allocated memory and then shows how to construct an object that allows the correct deallocator to be called when the NumPy array is freed. This may be...
0
9586
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
10043
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
9990
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
9861
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
1
7406
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
6672
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
5298
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...
1
3956
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
2
3561
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

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.