I am attempting to figure out why calling a function in a dynamically loaded lib crashes python. I’m doing the following, I have a C++ function in a dynamic library file, which is loaded in python using ctypes. I then call the function from python: On MacOS, this works exactly as expected. Unfortunately…
Tag: c++
how do i display a grid of images (and have them them transparent until a keyboard key is pressed) [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 months ago. Improve this question any language. im wanting to make a program that will show what ability…
Implementation of stable_sort in python
In c++ there is a function stable_sort() function (It preserves the order ) .Is there any function in python like this ? Answer list.sort() is stable. From the documentation: The sort() method is guaranteed to be stable. A sort is stable if it guarantees not to change the relative order of elements that compa…
Subset algorithm behaves differently in Python than C++
The algorithm follows recursive approach, dividing the array in two parts: In first recursion the first part is neglected In second part the first part is added Code for C++ (Works Fine) Code for Python Answer In the C++ version, res is a by-value parameter, so a copy of the vector is made in each call. Pytho…
Get quotient and residue from a division executing just one operation [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 months ago. Improve this question I need to know how can i get quotient and residue from a division executi…
Why does pybind fail for functions without arguments?
I have an overloaded constructor in C++ (default + other). My automatically generated pybind code looks like this: When I delete the first constructor everything works fine. But for the first one I get this error: Does anyone know why this error is coming up and how to fix it? Edit: I am using a custom pybind…
pybind11 crashes (segmentation fault (core dumped)) while importing ONNX python module
I am using pybind11 in my C++ code. When I try to import onnx, my code crashes with Segmentation fault (core dumped). However, if I import onnxruntime, everything is well. Of course both onnx and onnxruntime are installed on my system via pip. The order of the import lines is irrelevant. Wherever it is, py::m…
String Slicing in c# using intervals
In python there are ways that allow you to access the string using an interval(slicing): Example Get the characters from position 2 to position 5 (not included): Is there something similar in c#? Answer In C# 8.0 (or higher) you can use ranges, e.g Or on old c# versions, Substring: Finally, you can use Linq, …
Wrapping a C++ library using msl-loadlib in python
I am currently writing a wrapper for a C++ library. The library is a 32-bits dll file and I’m using 64-bits so I’m using msl-loadlib. I have a problem wrapping a function that has pointer parameters. Here is the header of the function in C++ and here the wrapper I wrote When I call Client.getMeasu…
float pointer in ctypes python and pass structure pointer
I’m trying to pass a structure pointer to the API wrapper, Where the struct is containing float pointer member. I’m not sure that how we can pass float pointer value to the structure. /Structure/ /wrapper/ Answer You can either create a c_float instance and initialize with a pointer to that instan…