Re: segfault using string from c?

[segmentation_fault]

if it helps this is the valgrind output 
    
    
    ==9355== Process terminating with default action of signal 11 (SIGSEGV)
    ==9355==  Access not within mapped region at address 0x0
    ==9355==    at 0x665CA1B: lowGauge_3mwQtFaBTgevFrybZdgUNw 
(stdlib_system.c:1380)
    ==9355==    by 0x6664A53: 
prepareForInteriorPointerChecking_Zqr3EQAAcehIfp3uSECEuQsystem 
(stdlib_system.c:1418)
    ==9355==    by 0x6664A53: collectCTBody_zoTIuavlrCHyw3B8MBaLJA_2 
(stdlib_system.c:4046)
    ==9355==    by 0x6664BF7: collectCT_zoTIuavlrCHyw3B8MBaLJA 
(stdlib_system.c:4115)
    ==9355==    by 0x6664ED8: rawNewObj_QBPo5VW2O56Eeh8hPbQ7Pg 
(stdlib_system.c:4210)
    ==9355==    by 0x666512F: newObjNoInit (stdlib_system.c:4226)
    ==9355==    by 0x66651B3: rawNewStringNoInit (stdlib_system.c:4243)
    ==9355==    by 0x6665251: toNimStr (stdlib_system.c:4707)
    ==9355==    by 0x665A7AB: read_csv (fib.c:335)
    ==9355==    by 0x6658C39: first_func (fib.c:22)
    ==9355==    by 0x4E9B9E: PyCFunction_Call (in /home/x/x/venv/bin/python3.5)
    ==9355==    by 0x524413: PyEval_EvalFrameEx (in 
/home/x/x/venv/bin/python3.5)
    ==9355==    by 0x52D2E2: ??? (in /home/x/x/venv/bin/python3.5)
    

and this is my c code 
    
    
    #include "nimcache/fib.h"
    #include <stdio.h>
    #include <Python.h>
    static PyObject* first_func(PyObject* self, PyObject* args)
    {
        char * value;
        
        if (!PyArg_ParseTuple(args, "s", &value))
            return NULL;
        
        read_csv("/home/x/Downloads/x.csv");
        
        return Py_BuildValue("f", 1.1);
    }