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 sys\n\
class CatchOutErr:\n\
def __init__(self):\n\
self.value = ''\n\
def write(self, txt):\n\
self.value += txt\n\
catchOutErr = CatchOutErr()\n\
sys.stdout = catchOutErr\n\
sys.stderr = catchOutErr\n\
"; //this is python code to redirect stdouts/stderr
Py_Initialize();
PyObject *pModule = PyImport_AddModule("__main__"); //create main module
PyRun_SimpleString(stdOutErr.c_str()); //invoke code 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;
}
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