def iterCountPeriods(self, timeStepInMin=None):
"""Return an iterator to the time periods the links has counts. A time
period is a tuple of (startTimeInMin, endTimeInMin)"""
if not timeStepInMin:
if self._obsCount:
for start, end in sorted(self._obsCount.iterkeys()):
yield (start, end)
countPeriods = set()
for movement in self.iterOutMovements():
for countPeriod in movement.iterCountPeriods():
countPeriods.add(countPeriod)
for start, end in iter(sorted(countPeriods)):
yield (start, end)
else:
if self._obsCount:
minTime = min(self._obsCount.keys())[0]
maxTime = max(self._obsCount.keys())[1]
for start, end in pairwise(range(minTime, maxTime + 1, timeStepInMin)):
yield (start, end)
else:
countPeriods = set()
for movement in self.iterOutMovements():
for countPeriod in movement.iterCountPeriods():
countPeriods.add(countPeriod)
minTime = min(countPeriods)[0]
maxTime = max(countPeriods)[1]
for start, end in pairwise(range(minTime, maxTime + 1, timeStepInMin)):
yield (start, end)
def getObsCount(self, startTimeInMin, endTimeInMin):
"""Return the observed number of vehicles executing the
movement in the input time span
Attention!
If there are Zero vehicles the function returns None
"""
self._validateInputTimes(startTimeInMin, endTimeInMin)
self._checkOutputTimeStep(startTimeInMin, endTimeInMin)
try:
return self._obsCount[startTimeInMin, endTimeInMin]
except KeyError:
result = 0
simTimeStep = self.simTimeStepInMin
if not simTimeStep:
raise SimError("To compute the count you need to set "
"simulation time step")
for i in range((endTimeInMin - startTimeInMin) / simTimeStep):
multipleOfSimTimeStep = (i + 1) * simTimeStep
result = 0
for startTime, endTime in pairwise(range(startTimeInMin,
endTimeInMin + 1, multipleOfSimTimeStep)):
try:
result += self._obsCount[startTime, endTime]
except KeyError, e:
result = 0
break
else:
return result
return result if result > 0 else None
def getObsCount(self, startTimeInMin, endTimeInMin):
self._validateInputTimes(startTimeInMin, endTimeInMin)
self._checkOutputTimeStep(startTimeInMin, endTimeInMin)
allMovementCounts = self._aggregateAllMovementCounts(startTimeInMin, endTimeInMin)
if allMovementCounts:
return allMovementCounts
else:
result = 0
simTimeStep = self.simTimeStepInMin
if not simTimeStep:
raise SimError("To return a count you need to set the simulation time step")
if (startTimeInMin, endTimeInMin) in self._obsCount:
return self._obsCount[startTimeInMin, endTimeInMin]
for i in range((endTimeInMin - startTimeInMin) / simTimeStep):
multipleOfSimTimeStep = (i + 1) * simTimeStep
result = 0
for startTime, endTime in pairwise(range(startTimeInMin, endTimeInMin + 1, multipleOfSimTimeStep)):
try:
result += self._obsCount[startTime, endTime]
except KeyError:
result = 0
break
else:
return result
return result if result > 0 else None
def readTimeVaryingMovementAttribute(self, fileName, attrName, startTimeInMin, endTimeInMin, timeStepInMin, hasHeader=True):
"""Reads a list of values from each line in the input fileName and assigns
each value to the corresponding time interval specified
by the last three input arguments
the movement attribute can be accesse as mov.attrName[startInMin, endInMin]
"""
assert self.simStartTimeInMin <= startTimeInMin < self.simEndTimeInMin
assert self.simStartTimeInMin < endTimeInMin <= self.simEndTimeInMin
assert timeStepInMin % self.simTimeStepInMin == 0
self._createTimeVaryingMovementAttribute(attrName)
inputStream = open(fileName, 'r')
if hasHeader:
inputStream.next()
numTimeIntervals = len(range(startTimeInMin, endTimeInMin, timeStepInMin))
for line in inputStream:
fields = line.strip().split(",")
nodeAid, nodeBid, nodeCid = fields[0].split()
if len(fields[1:]) != numTimeIntervals:
raise GraphError('The number of time intervals from %d to %d using time step %d'
' are not the same as the number of columns in %s' %
(startTimeInMin, endTimeInMin, timeStepInMin, fileName))
attrValue = {}
i = 1
allValuesAreZero = True
for start, end in pairwise(range(startTimeInMin, endTimeInMin + 1, timeStepInMin)):
singleValue = float(fields[i])
if singleValue != 0:
allValuesAreZero = False
attrValue[start, end] = singleValue
i += 1
if allValuesAreZero:
continue
try:
edge = self.getEdge(nodeAid, nodeBid)
movement = edge.getOutMovement(nodeCid)
if movement.isUTurn():
continue
except BaseNetworkError, e:
if nodeCid == nodeAid:
continue
logging.error(str(e))
continue
except DynameqError, e:
logging.error(str(e))
continue
def iterCountPeriods(self, timeStepInMin=None):
"""Return the periods as tuples of start end endTime (in min)
for which there is a count"""
if not timeStepInMin:
for start, end in sorted(self._obsCount.keys()):
yield (start, end)
else:
minTime = min(self._obsCount.keys())[0]
maxTime = max(self._obsCount.keys())[1]
for start, end in pairwise(range(minTime, maxTime + 1, timeStepInMin)):
yield (start, end)
def getSimVolume(self, startTimeInMin, endTimeInMin):
"""GEt the simulated volume for the specified time
period """
self._validateInputTimes(startTimeInMin, endTimeInMin)
self._checkOutputTimeStep(startTimeInMin, endTimeInMin)
result = 0
for stTime, enTime in pairwise(range(startTimeInMin, endTimeInMin + 1,
self.simTimeStepInMin)):
result += self._simVolume[stTime, enTime]
return result
def getSimVolume(self, startTimeInMin, endTimeInMin):
"""Return the volume on the link from startTimeInMin to endTimeInMin"""
self._validateInputTimes(startTimeInMin, endTimeInMin)
self._checkOutputTimeStep(startTimeInMin, endTimeInMin)
if self.getNumOutMovements() > 0:
return sum([mov.getSimVolume(startTimeInMin, endTimeInMin)
for mov in self.iterOutMovements()])
else:
result = 0
for stTime, enTime in pairwise(range(startTimeInMin, endTimeInMin + 1,
self.simTimeStepInMin)):
result += self._simVolume[stTime, enTime]
return result
def iterVehicles(self, startTimeInMin, endTimeInMin):
"""Return an iterator to all the vehicles that leave the edge in the
input time period"""
self._validateInputTimes(startTimeInMin, endTimeInMin)
self._checkOutputTimeStep(startTimeInMin, endTimeInMin)
if self.getNumOutMovements() == 0:
result = []
for stTime, enTime in pairwise(range(startTimeInMin, endTimeInMin + 1,
self.simTimeStepInMin)):
result.append(self._vehicles[stTime, enTime])
return chain(*result)
else:
return chain(*[mov.iterVehicles(startTimeInMin, endTimeInMin) for mov in
self.iterOutMovements()])
def readTimeVaryingEdgeAttribute(self, fileName, attrName, startTimeInMin, endTimeInMin, timeStepInMin, hasHeader=True):
assert self.simStartTimeInMin <= startTimeInMin < self.simEndTimeInMin
assert self.simStartTimeInMin < endTimeInMin <= self.simEndTimeInMin
assert timeStepInMin % self.simTimeStepInMin == 0
self._createTimeVaryingEdgeAttribute(attrName)
numTimeIntervals = len(range(startTimeInMin, endTimeInMin, timeStepInMin))
inputStream = open(fileName, 'r')
if hasHeader:
inputStream.next() # this is the header
for line in inputStream:
fields = line.strip().split(",")
nodeAid, nodeBid = fields[:2]
try:
edge = self.getEdge(nodeAid, nodeBid)
except Graph, e:
logging.error(str(e))
continue
attrValue = {}
i = 2
if len(fields[2:]) != numTimeIntervals:
raise Graph('The number of time intervals from %d to %d using time step %d'
' are not the same as the number of columns in %s' %
(startTimeInMin, endTimeInMin, timeStepInMin, fileName))
for start, end in pairwise(range(startTimeInMin, endTimeInMin + 1, timeStepInMin)):
attrValue[start, end] = float(fields[i])
i += 1
setattr(edge, attrName, attrValue)
