Help on convert PyObject to string (c) Python 3.6

[Jason Qian via Python-list]

Hi,

   This is the case of calling python from c and the python function  will
return a string.

   It seems python been called correctly, but got error when convert the
python string to c string.

-- c --

   PyObject* pValue = PyObject_CallObject(pFunc, pArgs);


-- python --

import string, random
def StringGen(argv):
    out_string_size=int(argv);
    output_data=''.join(random.choice(string.ascii_lowercase) for x in
range(out_string_size))
    return output_data


I try:

 PyObject* pValue = PyObject_CallObject(pFunc, pArgs);
const char* sp = 0;
if (!PyArg_ParseTuple(pValue, "s", &sp)) {
}

and got

"SystemError: new style getargs format but argument is not a tuple"



Thanks for the help
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