从python返回字符串到C ++

问题描述

我的python代码具有返回字符串的方法。

import urllib.request
import ssl
import suds.transport.http
from suds.client import Client

class UnverifiedHttpsTransport(suds.transport.http.HttpTransport):
  def __init__(self,*args,**kwargs):
     super(UnverifiedHttpsTransport,self).__init__(*args,**kwargs)
  def u2handlers(self):
     handlers = super(UnverifiedHttpsTransport,self).u2handlers()
     context = ssl.create_default_context()
     context.check_hostname = False
     context.verify_mode = ssl.CERT_NONE
     handlers.append(urllib.request.HTTPSHandler(context=context))
     return handlers

url="https://atictest.com/datamanagement.asmx?WSDL"
client = Client(url,transport=UnverifiedHttpsTransport())

def ReadDatatest():
  result = client.service.ReadTestData()
  return result

def ReadGridData():
  result = client.service.ReadGridData()  
  return result

def main():
  result=ReadGridData()
  print(result)

if __name__ == "__main__":
  main() 

如果调用ReadDataTest（）方法，则结果为字符串{"Message":"You Have Successfully Connected"}。

由于此python方法是从C ++调用的，因此我需要解析C ++中的String返回。

我尝试过

pFunc_readtest = PyObject_GetAttrString(pModule,"ReadDataTest");
if (pFunc_readtest && PyCallable_Check(pFunc_readtest)) {
  pValue = PyObject_CallObject(pFunc_readtest,NULL);
  if(pValue != NULL) {
     std::string m_gettextFunction = PyObject_GetAttrString(pValue,"gettext");
     printf("Result of call: %c\n",m_gettextFunction);
     Py_DECREF(pValue);
  }
}

但是我在编译时出错。如何从python接收字符串到C ++？

解决方法

PyObject_GetAttrString返回一个PyObject *，请正确处理，这是代码：

pFunc_readtest = PyObject_GetAttrString(pModule,"ReadDataTest");
if (pFunc_readtest && PyCallable_Check(pFunc_readtest)) {
    pValue = PyObject_CallObject(pFunc_readtest,NULL);
    if(pValue != NULL) {
        PyObject * res = PyObject_GetAttrString(pValue,"gettext");
        if (!PyUnicode_Check(res)) {
            // not a string,return error here
        }
        std::string m_gettextFunction = std::string(PyUnicode_AsUTF8(res));
        printf("Result of call: %c\n",m_gettextFunction);
        Py_DECREF(pValue);
    }
}

如果gettext是一种方法，请调用它，不要仅仅获取它：

PyObject * res = PyObject_CallMethod(pValue,"gettext",NULL);