c++ - Segmentation fault in PyString_AsString function -

c++ code

//quicktest.cpp #include <python.h> #include <new> extern "c"  {     int test1(pyobject *src)     {     char *src1 = pystring_asstring(src);  // <-- segmentation fault     return 0;     }  } 

python code

import ctypes test_lib = ctypes.cdll('./quicktest.so'); test_lib.test1("test")  #  <-- segmentation fault 

there segmentation fault ("received sigserv") in pystring_asstring call.

linux 64 bit, python2.7

can explain, error in code?

[edit: code in question has changed]

the function pystring_asstring needs pointer pyobject , passing pointer char. python/c api reference manual

from ctypes documentation (calling functions):

byte strings , unicode strings passed pointer memory block contains data (char * or wchar_t *)

now, after changing question, improperly casting pointer char pointer pyobject when calling test1 function.

so function test1 receiving pointer char and, @ end of day, pystring_asstring receiving pointer char converted pointer pyobject wrongly.

to learn more: python c/api tutorial