--- a
+++ b/sandbox/test_iterators.py
@@ -0,0 +1,15 @@
+from configuration import set_configuration, config
+import utils_plots
+import numpy as np
+
+set_configuration('configs_seg_scan', 'luna_s_local')
+
+data_iter = config().valid_data_iterator
+for (x, y, lung_mask, annotations, transform_matrices, pid) in data_iter.generate():
+
+    predictions_scan = lung_mask * x
+
+    for nodule_n, zyxd in enumerate(annotations):
+        utils_plots.plot_slice_3d_4(input=x[0, 0], lung_mask=lung_mask[0, 0], prediction=predictions_scan[0, 0],
+                                    mask=y[0, 0],
+                                    axis=0, pid='-'.join([str(nodule_n), str(pid)]), idx=zyxd)