def _select(self, pop):
node = Node(self.problem, pop,
self.settings.pop_size).divide(sqrt(pop))
non_dom_leafs = node.nonpruned_leaves()
all_leafs = node.leaves()
# Counting number of evals
evals = 0
for leaf in all_leafs:
for row in leaf._pop:
if row.evaluated:
evals += 1
return non_dom_leafs, evals
