All Questions
670 questions
0
votes
2
answers
61
views
Issue regarding overlap of memory allocation for separate dataclasses
I am experimenting with defining dataclasses for containing ctypes objects. I have defined three classes; two of which are used as attributes to the third:
@dataclasses.dataclass
class Point:
x = ...
- 41
0
votes
1
answer
83
views
Why double `ctypes.POINTER` object works for `char***` while triple `ctypes.POINTER` would make more sense?
I have a library my_lib with a C function that takes a char*** parameter, a pointer to an array of char* that is allocated by the function. Here is a minimal reproducible example of such a function:
...
- 21.8k
0
votes
3
answers
96
views
Pointer in while loop condition in Python
I need function_B to wait for function_A. The wait_for_action_to_be_done() function does the job but I would like something more convenient with wait_for(action_to_wait). The issue is that, in ...
- 195
0
votes
0
answers
50
views
Using complex objects as dictionary keys in Python
So I'm working XML files and am not quite sure if what I'm doing is 'Pythonic' enough.
The XML file has tagged text and I want to get all paragraphs that contain countries and rivers. So each ...
- 41
0
votes
5
answers
200
views
How about the recursive code for "Find Zero" I've written?
Here's the problem:
Given an array nums, write a function that moves all 0s to the end of the array while maintaining the relative order of the non-zero elements.
Please note that the array must be ...
0
votes
0
answers
25
views
Error while trying to read value from pointer with pymem
This is my first project where i want to read value from offset in one game but it gives me error: An error occurred:
Could not read memory at: 1436923512, length: 4 - GetLastError: 299.
import ...
- 1
1
vote
2
answers
220
views
ctypes "crashes" while trying to return pointer
I am currently trying to get a pointer element back from .dll library (compiled using cygwin and gcc - Source code is in C). But when executing the C function inside of python. The programm just "...
0
votes
1
answer
62
views
Callback in python ctypes
I'm trying to wrap a C library in Python using ctypes. A function call requires a callback function which I implemented using the programming manual.The problem is that I'm unable get the return value ...
0
votes
0
answers
67
views
A property of Python class returns an empty numpy array with pybind11
I adopted a project that was abandoned by it's original creator on GH: pybind11 bindings for whispercpp. I had to update Python version from 3.8 to 3.11.8 in CI and discovered that some of the test ...
- 175
0
votes
2
answers
96
views
Multiprocessing sharing c pointer in Python
I tried implementing tree sitter support in Python using multiprocessing but the Python process is crashing. Further below is a Minimum Reproducible Example.
My needs are to be able to send the ...
- 213
2
votes
1
answer
87
views
Longest Repeating Substring With Replacement
Working on an online practice problem and ran into an issue that I can't seem to figure out. I am looking to find the longest length of a string of characters whose characters can only be replaced &...
- 45
0
votes
1
answer
104
views
Transfer pointer from dll (c/c++) to python
I have a DLL written in C++ ( it can be rewritten in C ) and python code where I import the DLL with cdll.LoadLibrary(). Then I specify a function from DLL and it's agrument types. Then I call the ...
- 41
0
votes
1
answer
34
views
How come original Head of the linked list changes while traversing over it in Python? Am I doing anything wrong?
In the below code, I'm not changing the value of Head still why am I not able to retain the value of Head?The input is a LinkedList: [5, 4, 2, 1]
class Solution:
def pairSum(self, head: Optional[...
0
votes
1
answer
122
views
Issue with converting C pointers to numpy arrays in Python
I'm trying to utilize a C library using ctypes in Python. The C library provides a subroutine that returns two arrays via pointers: one for integer data and one for float data.
Here's a simplified ...
0
votes
1
answer
61
views
Python integer saved by reference instead of value in an iterable
I have a simple for loop with a count variable that gets saved into a dictionary as part of a string.
def chunk_page(page):
pages = []
chunks = chunk_string(page['content'], 500, 40)
ints =...