Source Code for Module Anomos.Measure

 1  # This program is free software: you can redistribute it and/or modify 
 2  # it under the terms of the GNU General Public License as published by 
 3  # the Free Software Foundation, either version 3 of the License, or 
 4  # (at your option) any later version. 
 5  # 
 6  # This program is distributed in the hope that it will be useful, 
 7  # but WITHOUT ANY WARRANTY; without even the implied warranty of 
 8  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 9  # GNU General Public License for more details. 
10  # 
11  # You should have received a copy of the GNU General Public License 
12  # along with this program.  If not, see <http://www.gnu.org/licenses/>. 
13   
14  # Written by Bram Cohen 
15   
16  from Anomos import bttime 
17   
18   
19 -class Measure(object): 
20   
21 -    def __init__(self, max_rate_period, fudge=5): 
22          self.max_rate_period = max_rate_period 
23          self.ratesince = bttime() - fudge 
24          self.last = self.ratesince 
25          self.rate = 0.0 
26          self.total = 0 
27   
28 -    def update_rate(self, amount): 
29          self.total += amount 
30          t = bttime() 
31          self.rate = (self.rate * (self.last - self.ratesince) + 
32              amount) / (t - self.ratesince) 
33          self.last = t 
34          if self.ratesince < t - self.max_rate_period: 
35              self.ratesince = t - self.max_rate_period 
36   
37 -    def get_rate(self): 
38          self.update_rate(0) 
39          return self.rate 
40   
41 -    def get_total(self): 
42          return self.total 
43