In [2]: a = np.arange(20.).reshape(4,5)
   ...: c_module.inc_array(a, 1.1)
   ...: print(a)
from inc_array
dimensions: 2, type: 12
[[ 1.1  2.1  3.1  4.1  5.1]
 [ 6.1  7.1  8.1  9.1 10.1]
 [11.1 12.1 13.1 14.1 15.1]
 [16.1 17.1 18.1 19.1 20.1]]