diff --git a/EXAMPLES/Python/DHT22_AM2302_SENSOR/DHT22.py b/EXAMPLES/Python/DHT22_AM2302_SENSOR/DHT22.py
index 519585e..c9ce87e 100755
--- a/EXAMPLES/Python/DHT22_AM2302_SENSOR/DHT22.py
+++ b/EXAMPLES/Python/DHT22_AM2302_SENSOR/DHT22.py
@@ -237,7 +237,7 @@ class sensor:
 
       self.pi.set_watchdog(self.gpio, 0)
 
-      if self.cb != None:
+      if self.cb is not None:
          self.cb.cancel()
          self.cb = None