class Trip(object):
'a class that abstracts a trip to a destination'
def __init__(self, destination='Nowhere', items=[] ):
'Initialize the Trip class'
self.destination = destination
self.items = items
class DayTrip(Trip):
'a class that abstracts a trip to a destination on a specific day'
def __init__(self, destination='Nowhere', items=[] , day='1/1/2019' ):
'Initialize the Trip class'
self.destination = destination
self.items = items
self.day = day
class ExtendedTrip(Trip):
'a class that abstracts a trip to a destination on between two dates'
def __init__(self, destination='Nowhere', items=[] , day='1/1/2019' ,
endDay = '12/31/2019' ):
'Initialize the ExtendedTrip class'
self.destination = destination
self.items = items
self.day = day
self.endDay = endDay
def luggage(lst):
我希望行李带走每个班级的所有物品，并打印一张列出所有这些独特物品的清单。
这些是一些示例输入：
trip1 = Trip('Basement', ['coat','pants','teddy bear'])
trip2 = DayTrip('Springfield',['floss', 'coat','belt'], '2/1/2018')
trip3 = ExtendedTrip('Mars',['shampoo', 'coat','belt'], '4/1/2058')
trip4 = ExtendedTrip()
每次旅行都会附加到一个列表中，然后它将获取一组打印此内容的项目列表：
{'pants', 'belt', 'toothbrush', 'floss', 'shampoo', 'teddy bear', 'coat'}
请尝试以下操作（未经测试）。
def luggage(lst):
items = set()
for trip in lst:
for item in trip.items:
items.add(item)
return items
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