如何在C ++代码中捕获python stdout

如何在C ++代码中捕获python stdout

如果我正确地阅读了您的问题，您想将stdout / stderr捕获到C 中的变量中吗？您可以通过将stdout /
stderr重定向到python变量，然后将此变量查询到C
中来实现。请不要说我没有在下面做适当的引用计数：

#include <Python.h>#include <string>int main(int argc, char** argv){    std::string stdOutErr ="import sysnclass CatchOutErr:n    def __init__(self):n        self.value = ''n    def write(self, txt):n        self.value += txtncatchOutErr = CatchOutErr()nsys.stdout = catchOutErrnsys.stderr = catchOutErrn"; //this is python pre to redirect stdouts/stderr    Py_Initialize();    PyObject *pModule = Pyimport_AddModule("__main__"); //create main module    PyRun_SimpleString(stdOutErr.c_str()); //invoke pre to redirect    PyRun_SimpleString("print(1+1)"); //this is ok stdout    PyRun_SimpleString("1+a"); //this creates an error    PyObject *catcher = PyObject_GetAttrString(pModule,"catchOutErr"); //get our catchOutErr created above    PyErr_Print(); //make python print any errors    PyObject *output = PyObject_GetAttrString(catcher,"value"); //get the stdout and stderr from our catchOutErr object    printf("Here's the output:n %s", PyString_AsString(output)); //it's not in our C++ portion    Py_Finalize();    return 0;}