Resize the ctypes array

Question

I would like to resize the ctypes array. As you can see, ctypes.resize does not work as it could. I can write a function to resize the array, but I wanted to know some other solutions. Maybe I am missing the ctypes trick or maybe I just used the resizing incorrectly. The name c_long_Array_0 seems to tell me that this may not work with resizing.

>>> from ctypes import *
>>> c_int * 0
<class '__main__.c_long_Array_0'>
>>> intType = c_int * 0
>>> foo = intType()
>>> foo
<__main__.c_long_Array_0 object at 0xb7ed9e84>
>>> foo[0]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: invalid index
>>> resize(foo, sizeof(c_int * 1))
>>> foo[0]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: invalid index
>>> foo
<__main__.c_long_Array_0 object at 0xb7ed9e84>
>>> sizeof(c_int * 0)
0
>>> sizeof(c_int * 1)
4

Edit: maybe something like:

>>> ctypes_resize = resize
>>> def resize(arr, type):
...     tmp = type()
...     for i in range(len(arr)):
...         tmp[i] = arr[i]
...     return tmp
...     
... 
>>> listType = c_int * 0
>>> list = listType()
>>> list = resize(list, c_int * 1)
>>> list[0]
0
>>> 

But this is an ugly type walkthrough instead of size. He works for his purpose and that he is.

Answer 1

from ctypes import *

list = (c_int*1)()

def customresize(array, new_size):
    resize(array, sizeof(array._type_)*new_size)
    return (array._type_*new_size).from_address(addressof(array))

list[0] = 123
list = customresize(list, 5)

>>> list[0]
123
>>> list[4]
0