[Python] Python: ctypes.CDLL cannot load c++ compiled shared .dll file

I have written some functions within my C++ app and i compiled it to use it as .dll and so i can use those functions in python for a better performance. The .dll file works fine when i'm using it for another C++ application but when i want to load it in my python program it throws this error:

Traceback (most recent call last):
File "e:\My Apps\Python\Telegram_Bots\Calculator\main.py", line 6, in <module>
lib = CDLL("E:\My Apps\Python\Telegram_Bots\Calculator\lib.dll")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "c:\Users\KHATAM_PC\AppData\Local\Programs\Python\Python311\Lib\ctypes\__init__.py", line 376, in __init__
self._handle = _dlopen(self._name, mode)
^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: Could not find module 'E:\My Apps\Python\Telegram_Bots\Calculator\lib.dll' (or one of its dependencies). Try using the full path with constructor syntax.


I've quarterable checked the path and even used the full-path, never worked, been trying for a whole day, compiling the .dll again and again in different ways and methods but nothing came out of them, all of them yet worked in C++

.dll exportation command: g++ -DMATH_DLL_EXPORTS -shared -std=c++17 -o lib.dll lib.cpp

lib.hpp:

// #pragma once

#ifndef MATH_DLL_API
#define MATH_DLL_API

#ifdef _WIN32
#define DLL_EXPORT __declspec(dllexport)
#else
#define DLL_EXPORT
#endif

#include <iostream>
#include <vector>
extern "C" {
DLL_EXPORT int precedence(char o);
DLL_EXPORT float calc(float a, float b, char o);
DLL_EXPORT void calculate(std::vector<float>& values, std::vector<char>& ops);
DLL_EXPORT float evaluate(std::string e);
}
#endif // MATH_DLL_API


lib.cpp:

#include "lib.hpp"
#include <iostream>
#include <vector>
extern "C" {
DLL_EXPORT int precedence(char o) { ... }
DLL_EXPORT float calc(float a, float b, char o) { ... }
DLL_EXPORT void calculate(std::vector<float>& values, std::vector<char>& ops) { ... }
DLL_EXPORT float evaluate(std::string e) { ... }
}


And finaly, the python script:

from ctypes import c_char, c_int, c_float, c_char_p, c_void_p, CDLL, cdll, POINTER

lib = CDLL("E:\My Apps\Python\Telegram_Bots\Calculator\lib.dll")

lib.evaluate.argtypes = [c_char_p]
lib.evaluate.restype = c_float

lib.calculate.argtypes = [POINTER(c_float), POINTER(c_char)]
lib.calculate.restype = c_void_p

lib.calc.argtypes = [c_float, c_float, c_char]
lib.calc.restype = c_float

lib.precedence.argtypes = [c_char]
lib.precedence.restype = c_int


Can anybody help please?

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