Python calling C functions Segment Fault

[Thierry Conter]

Hi, i'm new here so this is my first post. I have a problem and i decided to post it here in case somebody knows the answer.
I have a program in python which is doing bit manipulations. Due to the big size of those binary dumps i'm using and to speed thing up i decided to do the manipulations in C. I use the ctypes extention with libraries to achieve this.
So what i have is:
IN PYTHON:
- a BitStream which i'm deviding in a list of Bytes
ex: [10101010,01010101,....]
- Then i encode thos bytes into number with the function
int("10101010",2) of python which gives me a number.
- then i put all those numbers in an list.
- [34,35,65]
- then with a loop i send those numbers 1 by 1 to my C function.
IN C:
- my C function gets the element 1 by 1 as they come and stores them into an globaly declared array of integers.
PROBLEM:
- The problem i have is that after a certain time or number of transactions, i get an Segment fault error
in my case to test if the numbers arrive to my C function i always send a counter back to python.
i send 4096 values to my C function after getting 2552 values back i get the Segment Fault error.
Here is my Code:
Python code:

for i in range(len(IntDump)):
    value = mylib.put_bin_into_array(IntDump[i])
    print value
 

C code:

int Array_Of_Numbers[4096][1];(global array)
int Num_of_elements=0; (global variable)
 
int put_bin_into_array(int number)
{
   Array_Of_Numbers[Num_of_elements][0]=number;
   Num_of_elements++;
   return Num_of_elements;
}
 

Could somebody please help me i need this to work.
Thank You
Best Regards
Conter Thierry

[dwblas]

then i put all those numbers in an list.
- [34,35,65]
- then with a loop i send those numbers 1 by 1 to my C function as the file is read.
IN C:

There is no reason to store them in a list. Just send the numbers, one by one to the C function. A "Segment Fault" error is not enough information. It sometimes means that not enough memory has been allocated, possibly for the C array, especially since it happens at the same place.

[Thierry Conter]

Well i have no other informations concerning the Segment Fault BUT i managed to get it to run. My error was the declaration of the array in C.
I declared it as:

int Array_Of_Numbers[4096][1]; 

istead of

 int Array_Of_Numbers[4096]; 

infact i know that it would be better to allocate the memory but i'm not that good in C

[dwblas]

i know that it would be better to allocate the memory but i'm not that good in C

The problem is solved and the program works which is the important thing.