`numpy.ctypeslib:as_array`

source: /numpy/ctypeslib/_ctypeslib.py :520

Signature

def as_array ( obj , shape = None )

Summary

Create a numpy array from a ctypes array or POINTER.

Extended Summary

The numpy array shares the memory with the ctypes object.

The shape parameter must be given if converting from a ctypes POINTER. The shape parameter is ignored if converting from a ctypes array

Examples

Converting a ctypes integer array:

import ctypes
ctypes_array = (ctypes.c_int * 5)(0, 1, 2, 3, 4)
np_array = np.ctypeslib.as_array(ctypes_array)
np_array

Converting a ctypes POINTER:

import ctypes
buffer = (ctypes.c_int * 5)(0, 1, 2, 3, 4)
pointer = ctypes.cast(buffer, ctypes.POINTER(ctypes.c_int))
np_array = np.ctypeslib.as_array(pointer, (5,))
np_array

Aliases

numpy.ctypeslib.as_array