timer.py

#durty timing stuff around the code
import time
class Timer:
    
    times = {}
    
    @staticmethod
    def start(key=''):
        if key not in Timer.times:
            Timer.times[key] = {'start': False, 'sum': 0}
        assert Timer.times[key]['start'] == False
        Timer.times[key]['start'] = time.time()
    
    @staticmethod
    def stop(key=''):
        assert key in Timer.times
        Timer.times[key]['sum'] += time.time() - Timer.times[key]['start']
        Timer.times[key]['start'] = False
    
    @staticmethod
    def keys():
        return Timer.times.keys()
        
    @staticmethod
    def sum(key=''):
        assert key in Timer.times
        assert Timer.times[key]['start'] == False
        return Timer.times[key]['sum']
        
    @staticmethod
    def reset():
        Timer.times = {}
        
    @staticmethod
    def report():
        for key in Timer.keys():
            print key, Timer.sum(key)
            
    
        
if __name__ == '__main__':
    Timer.start()
    Timer.stop()
    Timer.start('foo')
    time.sleep(2)
    Timer.stop('foo')
    Timer.start('foo')
    time.sleep(1)
    Timer.stop('foo')
    Timer.start('aa')
    time.sleep(1)
    Timer.stop('aa')
    Timer.report()