def readScenario(file,users,supply):
fin=open(file)
title=fin.readline()
scenario=Scenario(title)
print "*** reading scenario file:",file ," :", title
seek(fin,"USER ID")
while True:
line=fin.readline()
toks=line.split("\t")
if len(toks) != 2:
break
user=users[toks[0]]
number=int(toks[1])
print "%25s" % user.id,"\t",number
scenario.appendCase(Case(user,number,supply))
return scenario
