diff --git a/monitoring/db/scripts/get_detailed_power.py b/monitoring/db/scripts/get_detailed_power.py
index 27c06e0..7f01db8 100755
--- a/monitoring/db/scripts/get_detailed_power.py
+++ b/monitoring/db/scripts/get_detailed_power.py
@@ -49,19 +49,19 @@ class Power:
 
 		idx_ts = 0; idx_node = 1; idx_value = 2
 		nodes = list(OrderedDict.fromkeys([line[idx_node] for line in data]))   # preserves order of nodes
-		cls = Power(nodes)
+		power = Power(nodes)
 
 		values = {}
 		for l in data:
 			ts = l[idx_ts]
 			if ts not in values:
 				values[ts] = []
-			power = l[idx_value]
-			values[ts].append(power)
+			value = l[idx_value]
+			values[ts].append(value)
 
 		epochs = values.keys()
 		for epoch in epochs:
-			cls.insert_epoch(epoch, values[epoch])
+			power.insert_epoch(epoch, values[epoch])
 
 		# check implicit assumptions: 1) ts/epochs are sorted
 		e = list(epochs)
@@ -77,7 +77,7 @@ class Power:
 				print("Warning: Unexpected number of nodes ({actual}/{expected})".format(actual=actual, expected=nnodes))
 				break
 		
-		return cls
+		return power
 
 	@classmethod
 	def from_db(cls, db, jobid, interval, hawk_ai):