Index: dialin/hd/air_pump.py
===================================================================
diff -u -r4bd0d881b01877bf5200ebbb9eda7dfc040ee702 -rc217b5f6630f0e962b436fc107ac12b1830bb6e2
--- dialin/hd/air_pump.py	(.../air_pump.py)	(revision 4bd0d881b01877bf5200ebbb9eda7dfc040ee702)
+++ dialin/hd/air_pump.py	(.../air_pump.py)	(revision c217b5f6630f0e962b436fc107ac12b1830bb6e2)
@@ -26,6 +26,11 @@
 
 
 class HDAirPump(AbstractSubSystem):
+    """
+    HDAirPump
+
+    Hemodialysis Delivery (HD) Dialin API sub-class for air pump related commands.
+    """
     def __init__(self, can_interface, logger: Logger):
         """
 
@@ -44,6 +49,11 @@
         self.air_pump_state = 0
 
     def get_air_pump_state(self):
+        """
+        Gets the air pump state
+
+        @return: the current air pump state.
+        """
         return self.air_pump_state
 
     @publish(["air_pump_state"])