Merge branch 'optional-interval' of https://github.com/Qwiko/kea-expo…

…rter into optional-interval

kea_exporter/cli.py

@@ -6,6 +6,18 @@
 from . import __project__, __version__
 
 
+class Timer:
+    def __init__(self):
+        self.reset()
+
+    def reset(self):
+        self.start_time = time.time()
+
+    def time_elapsed(self):
+        now_time = time.time()
+        return now_time - self.start_time
+
+
 class Timer:
     def __init__(self):
         self.reset()