add error handling for iterate-lights

bin/rzr

@@ -121,7 +121,7 @@ def iterate_lights():
         device.fx.none()
         device.fx.advanced.draw()
 
-    # Iterate through device matrices and turn on one light every second
+    # Iterate through all devices
     for device in device_manager.devices:
 
         # Wait five seconds
@@ -129,6 +129,9 @@ def iterate_lights():
             print("{} will be iterated in {} seconds".format(device.name, i))
             time.sleep(1)
 
+        try:
+
+            # Turn on one light every second
             for i in range(device.fx.advanced.rows):
                 for j in range(device.fx.advanced.cols):
                     device.fx.advanced.matrix[i, j] = (255, 255, 255)
@@ -136,6 +139,10 @@ def iterate_lights():
                     print("{}: [{}, {}]".format(device.name, i, j))
                     time.sleep(1)
 
+        except Exception as e:
+            error("failed to iterate device '{}': {}".format(device.name, e))
+            exit(1)
+
 
 def list_devices():