Getting data from ctypes array into numpy

Question

I am using a Python (via ctypes) wrapped C library to run a series of computation. At different stages of the running, I want to get data into Python, and spec

Answer 1

np.ctypeslib.as_array is all you need here.

From an array:

 c_arr = (c_float * 8)()
 np.ctypeslib.as_array(c_arr)

From a pointer

 c_arr = (c_float * 8)()
 ptr = ctypes.pointer(c_arr[0])
 np.ctypeslib.as_array(ptr, shape=(8,))