def buildList(listAct):
""" Add the start activity and end activity
"""
listStart = []
listActWithPred = [] #List of activities having at least predecessor
start = Activity(-1, "start", listStart, 0, None)
start.EST = 0
start.LST = 0
start.LFT = 0
end = Activity(-2, "end", None, 0, None)
for act in listAct:
if (act.successors is None):
act.successors = [end]
end.predecessors.append(act)
else:
listActWithPred.extend(act.successors)
for suc in act.successors: #adding predecessors
suc.predecessors.append(act)
for act in listAct:
if (not act in listActWithPred):
start.successors.append(act)
act.predecessors.append(start)
listAct.insert(0, start)
listAct.append(end)
