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comparison light8/updatefreq.py @ 0:45b12307c695

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Initial revision
author drewp
date Wed, 03 Jul 2002 09:37:57 +0000
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children b75bfbcf5979
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-1:000000000000 0:45b12307c695
1 """calculates your updates-per-second"""
2
3 import time
4
5 class Updatefreq:
6 """make one of these, call update() on it as much as you want,
7 and then float() or str() the object to learn the updates per second.
8
9 the samples param to __init__ specifies how many past updates will
10 be stored. """
11
12 def __init__(self,samples=20):
13 self.times=[0]
14 self.samples=samples
15
16 def update(self):
17
18 """call this every time you do an update"""
19 self.times=self.times[-self.samples:]
20 self.times.append(time.time())
21
22 def __float__(self):
23
24 """a cheap algorithm, for now, which looks at the first and
25 last times only"""
26
27 try:
28 hz=len(self.times)/(self.times[-1]-self.times[0])
29 except ZeroDivisionError:
30 return 0
31 return hz
32 def __str__(self):
33 return "%.2fHz"%float(self)