快递系统中,以下Python代码输出结果是?( )
class Package:
def __init__(self, weight):
self.weight = weight
def fee(self):
return self.weight * 10
class Express(Package):
def fee(self):
return self.weight * 15 + 5
p = Package(2)
e = Express(2)
print(p.fee(), e.fee())
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