I was thinking the same thing. Great video, but the "okay"s were distracting. OP, please opt for silence, much better than filler words (for the viewers)

@@YounesLab thanks mate

@@valsk01what did they say

@@shuryimaziz3426 i not sure... idk why he deleted it :(

For anyone in the future this occurs because you need to compile your program into 64-bit. I had MinGW installed and it uses 32-bit and compiles 32-bit so even if you use the -m64 flag with the gcc command it doesn't work. I had to delete the C:/MinGW folder and path environment variable, then install the x86_64 version of Cygwin, then install the gcc-core package (which installs gcc). Then I had to add C:/cygwin64/bin to my path environment variable so the command would be recognized. Then I just compiled binaries with this command (where function.c was my .c file to compile): gcc -m64 -shared -o function.dll function.c Hope this helps.

Sounds like a datatype issue. Are you using regular integers, or are you using the ctypes datatypes like longlong which have a much larger range of values. If not, switch to using those.

@@coderslegacy5661 Hi. After carfully looking for problems, I found out that I hadn't actually had this problem I mentioned above. I already got the right answer, but not showing it in the right place was because python doesn't show the results from the called c function until the exit time. My code(s) ends with a graph plotting, however only after I close the plot window (of matplotlib) and the program terminates, it shows the results from the c function, although in the code itself executing the ctype thing should come first because it is at the beginning of the code. So, It's like python delays the execution of any ctypes till the end at the exit-time. I have tried it with many cases and codes. The same happens every single time. And this is, I think, a weak point in ctypes.

@@ankidokolo , The problem is probably related to the Python GIL. Try to isolate C-calls into separate Python-functions, it may provide some 'hints' for the Python interpreter... Another problem could be the Mathlib/Matplotlib themselves written in C and calls to different C-libraries could be organized in a sequential way in Python... Just my versions!

Did you recompile your C/C++ code after your added the display function? You might also want to make sure your file paths are correct, and the Python code is locating the shared file properly.

I'm running this on windows, so ig its a windows thing.

@@coderslegacy5661 Wow, TIL.

I have more than just one video on ctypes. Its a pretty vast topic, and even the 3-4 videos I have on it now do not do it full justice. At any rate, you will likely find the answer to your question here: kzfaq.info/get/bejne/eMmHp6aHxJnNoYE.html

@@coderslegacy5661 Thank you. I did not find where you returned char* from C and python reading it. In my project I tried using str = cpp.TestString() print(str) #prints some number print(c_char_p(str)) # does not print anything print(c_char_p(str).value)) # crash in C the function is straight forward: char* TestString() { char* str = (char *) malloc(100); strcpy(str, "Hello"); return str; }

@@2dapoint424 I see. It must have been in the other video then, about pointers. I understand your problem. What you need to do in your Python file, is this. cstring_pointer = alloc_func() str =ctypes.c_char_p.from_buffer(cstring_pointer) print(str.value) Here is a link to the article of mine from which I picked up this code. You can view the full thing there. coderslegacy.com/python/using-pointers-with-ctypes/

@@coderslegacy5661 This was super helpful bro!!!!! Thank you so much, I had spent weeks in vain... Can I ask you one thing, any book you can recommend where I can learn more about all this please? your website is super helpful, am passing this to my school friends..

@@2dapoint424 Glad to have been of help. I'm afraid I don't know about any book for ctypes. I've been learning it using the documentation page + going through other peoples code on stack overflow. I've realized that alot of people have trouble with ctypes, so I'm planning to release some more content on it. I have two video tutorials planned for this week.

I've talked about C++ specifically in this video here. kzfaq.info/get/bejne/mJd1YJd2v7Cdf4k.html There is an extra thing or two you need to do for C++ code, so I made a video dedicated to C++ with ctypes.

@@coderslegacy5661 thank you.