Fatal Python error: Py_Initialize: unable to load the file system codec & ModuleNotFoundError

Question

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我想从 C++ 访问 python 函数，我正在使用 C++17 和 Python 3.7.3。

我的Visual Studio项目设置

C/C++ > 常规 > 附加包含目录 > "D:\Programme\vcpkg\installed\x64-windows\include\python3.6"
链接器 > 常规 > 附加库目录 > "D:\Programme\vcpkg\installed\x64-windows\lib"
链接器 > 输入 > 附加依赖项 > 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

我的目录

directory of files

release version

solution directory

错误

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):

Answer 1

我从这个 post Py_Initialize fails - unable to load the file system codec

中找到了 @Calvin1602（Whosebug 用户）的有效解决方案

I just ran into the exact same problem (same Python version, OS, code, etc).

You just have to copy Python's Lib/ directory in your program's working directory ( on VC it's the directory where the .vcproj is )

Fatal Python error: Py_Initialize: unable to load the file system codec & ModuleNotFoundError

Fatal Python error: Py_Initialize: unable to load the file system codec & ModuleNotFoundError

c++

python

embed

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我的Visual Studio项目设置

Main.cpp

Sample.py

我的目录

错误