not_none.pyx 298 Bytes
import numpy as np

def process_buffer(int[:,:] input_view not None,
                   int[:,:] output_view=None):

   if output_view is None:
       # Creating a default view, e.g.
       output_view = np.empty_like(input_view)

   # process 'input_view' into 'output_view'
   return output_view