Be explicit with tuples for %s formattinguse-explicit-tuples-for-strings

Fix #1633

1 files changed, 1 insertions, 1 deletions

diff --git a/kafka/metrics/stats/sensor.py b/kafka/metrics/stats/sensor.py
index 73a4665..571723f 100644
--- a/kafka/metrics/stats/sensor.py
+++ b/kafka/metrics/stats/sensor.py
@@ -35,7 +35,7 @@ class Sensor(object):
         """Validate that this sensor doesn't end up referencing itself."""
         if self in sensors:
             raise ValueError('Circular dependency in sensors: %s is its own'
-                             'parent.' % self.name)
+                             'parent.' % (self.name,))
         sensors.add(self)
         for parent in self._parents:
             parent._check_forest(sensors)