store module execution interval as float not int

diff --git a/plugins.d/python.d.plugin b/plugins.d/python.d.plugin
index 22292aac0a4cb003ebd51b00b608d1663a4dd238..59c6f6ffc15c250de34a420625d6406cad7f0d53 100755 (executable)
--- a/plugins.d/python.d.plugin
+++ b/plugins.d/python.d.plugin
@@ -54,7 +54,7 @@ class PythonCharts(object):
             if interval < self.interval:
                 interval = self.interval
             # charts updates are twice as frequent as user specified
-            self.timetable[m.__name__] = [0, interval/2]
+            self.timetable[m.__name__] = [0, interval/2.0]
 
     def import_plugin(self, path, name=None):
         if name is None: