Intention
I want to access a python function from C++ and am using C++17 and Python 3.7.3.
My Visual Studio Project settings
- C/C++ > General > Additional include directories > "D:\Programme\vcpkg\installed\x64-windows\include\python3.6"
- Linker > General > Additional library directories > "D:\Programme\vcpkg\installed\x64-windows\lib"
- Linker > Input > Additional Dependencies > python36.lib;...
Main.cpp
#include <Python.h>
#include <iostream>
#include "tchar.h"
int _tmain(int argc, _TCHAR* argv[])
{
printf("Calling Python to find the sum of 2 and 2.\n");
// Initialize the Python interpreter.
Py_Initialize();
// Create some Python objects that will later be assigned values.
PyObject *pName, *pModule, *pDict, *pFunc, *pArgs, *pValue;
// Convert the file name to a Python string.
pName = PyUnicode_FromString("Sample");
// Import the file as a Python module.
pModule = PyImport_Import(pName);
// Create a dictionary for the contents of the module.
pDict = PyModule_GetDict(pModule);
// Get the add method from the dictionary.
pFunc = PyDict_GetItemString(pDict, "add");
// Create a Python tuple to hold the arguments to the method.
pArgs = PyTuple_New(2);
// Convert 2 to a Python integer.
pValue = PyLong_FromLong(2);
// Set the Python int as the first and second arguments to the method.
PyTuple_SetItem(pArgs, 0, pValue);
PyTuple_SetItem(pArgs, 1, pValue);
// Call the function with the arguments.
PyObject* pResult = PyObject_CallObject(pFunc, pArgs);
// Print a message if calling the method failed.
if (pResult == NULL)
printf("Calling the add method failed.\n");
// Convert the result to a long from a Python object.
long result = PyLong_AsLong(pResult);
// Destroy the Python interpreter.
Py_Finalize();
// Print the result.
printf("The result is %d.\n", result); std::cin.ignore(); return 0;
}
Sample.py
# Returns the sum of two numbers.
def add(a, b):
return a + b
My directories
The error
Calling Python to find the sum of 2 and 2.
Fatal Python error: Py_Initialize: unable to load the file system codec
ModuleNotFoundError: No module named 'encodings'
Current thread 0x00003ca0 (most recent call first):
