Mercurial > templog
comparison py/utils.py @ 271:11cebd6f0bfb
untested fridge.integrator
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 11 Nov 2015 00:20:20 +0800 |
| parents | 9d0313b685ae |
| children | af924d27140f |
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| 270:9d0313b685ae | 271:11cebd6f0bfb |
|---|---|
| 172 else: | 172 else: |
| 173 D(msg) | 173 D(msg) |
| 174 | 174 |
| 175 class StepIntegrator(object): | 175 class StepIntegrator(object): |
| 176 """ | 176 """ |
| 177 Takes on/off events and a monotonically increasing timefn. Returns the integral | |
| 178 of (now-limittime, now) over those events. | |
| 179 | |
| 177 >>> s = StepIntegrator(lambda: t, 40) | 180 >>> s = StepIntegrator(lambda: t, 40) |
| 178 >>> t = 1 | 181 >>> t = 1 |
| 179 >>> s.turn(1) | 182 >>> s.turn(1) |
| 180 >>> t = 10 | 183 >>> t = 10 |
| 181 >>> s.turn(0) | 184 >>> s.turn(0) |
| 209 def __init__(self, timefn, limittime): | 212 def __init__(self, timefn, limittime): |
| 210 # _on_periods is a list of [[start, end]]. End is None if still on | 213 # _on_periods is a list of [[start, end]]. End is None if still on |
| 211 self._on_periods = [] | 214 self._on_periods = [] |
| 212 self._timefn = timefn | 215 self._timefn = timefn |
| 213 self._limittime = limittime | 216 self._limittime = limittime |
| 217 | |
| 218 def set_limit(self, limittime): | |
| 219 if self._limittime == limittime: | |
| 220 return | |
| 221 self._limittime = limittime | |
| 222 self.trim() | |
| 214 | 223 |
| 215 def turn(self, value): | 224 def turn(self, value): |
| 216 if not self._on_periods: | 225 if not self._on_periods: |
| 217 if value: | 226 if value: |
| 218 self._on_periods.append([self._timefn(), None]) | 227 self._on_periods.append([self._timefn(), None]) |