bbengfort · July 7, 2023 04:33 · Feb 3, 2016 · Feb 3, 2016
diff --git a/interval.py b/interval.py
@@ -12,7 +12,7 @@ def __init__(self, interval, function, args=[], kwargs={}):
         self.running  = False 
         self._timer   = None 
 
-    def _handle(self):
+    def __call__(self):
         """
         Handler function for calling the partial and continuting. 
         """
@@ -29,7 +29,7 @@ def start(self):
             return 
 
         # Create the timer object, start and set state. 
-        self._timer = Timer(self.interval, self._handle)
+        self._timer = Timer(self.interval, self)
         self._timer.start() 
         self.running = True
 

diff --git a/interval.py b/interval.py
@@ -0,0 +1,69 @@
+from threading import Timer
+from functools import partial
+
+class Interval(object):
+
+    def __init__(self, interval, function, args=[], kwargs={}):
+        """
+        Runs the function at a specified interval with given arguments.
+        """
+        self.interval = interval
+        self.function = partial(function, *args, **kwargs)
+        self.running  = False 
+        self._timer   = None 
+
+    def _handle(self):
+        """
+        Handler function for calling the partial and continuting. 
+        """
+        self.running = False  # mark not running
+        self.start()          # reset the timer for the next go 
+        self.function()       # call the partial function 
+
+    def start(self):
+        """
+        Starts the interval and lets it run. 
+        """
+        if self.running:
+            # Don't start if we're running! 
+            return 
+
+        # Create the timer object, start and set state. 
+        self._timer = Timer(self.interval, self._handle)
+        self._timer.start() 
+        self.running = True
+
+    def stop(self):
+        """
+        Cancel the interval (no more function calls).
+        """
+        if self._timer:
+            self._timer.cancel() 
+        self.running = False 
+        self._timer  = None
+
+
+if __name__ == "__main__":
+    import time 
+    import random
+
+    def clock(start):
+        """
+        Prints out the elapsed time when called from start.
+        """
+        print "elapsed: {:0.3f} seconds".format(
+            time.time() - start
+        )
+
+    # Create an interval. 
+    interval = Interval(random.randint(1,3), clock, args=[time.time(),])
+    print "Starting Interval, press CTRL+C to stop."
+    interval.start() 
+
+    while True:
+        try:
+            time.sleep(0.1)
+        except KeyboardInterrupt:
+            print "Shutting down interval ..."
+            interval.stop()
+            break
No results found