added print of channels

reduce.py

@@ -48,6 +48,8 @@ channels_all = channels_pp
 
 with SFDataFile(args.input) as step:
     resultsPP, results, _, _ = load_data_compact_pump_probe(channels_pp, channels_all, step)
+    
+print (channels_pp)
 
 res = {}
 for name, chan in channels_mapping.items():