Added new blocking scheme "split"

proxtoolbox/Problems/ptychography.py

@@ -2040,6 +2040,8 @@ class Ptychography(Problem):
                             placed[p] = True;
         elif blocking_scheme == 'distribute':
             in_block = numpy.arange(N_pie) % (rows*cols);
+        elif blocking_scheme == 'split':
+            in_block = numpy.arange(N_pie) // (N_pie//(rows*cols));
         else:
             raise NotImplementedError('NYI')
         self.config['in_block'] = in_block;