48 lines
1.0 KiB
Python
48 lines
1.0 KiB
Python
"""
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>>> bus1 = HauntedBus(['Alice', 'Bill'])
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>>> bus1.passengers
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['Alice', 'Bill']
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>>> bus1.pick('Charlie')
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>>> bus1.drop('Alice')
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>>> bus1.passengers
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['Bill', 'Charlie']
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>>> bus2 = HauntedBus()
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>>> bus2.pick('Carrie')
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>>> bus2.passengers
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['Carrie']
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>>> bus3 = HauntedBus()
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>>> bus3.passengers
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['Carrie']
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>>> bus3.pick('Dave')
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>>> bus2.passengers
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['Carrie', 'Dave']
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>>> bus2.passengers is bus3.passengers
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True
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>>> bus1.passengers
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['Bill', 'Charlie']
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>>> dir(HauntedBus.__init__) # doctest: +ELLIPSIS
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['__annotations__', '__call__', ..., '__defaults__', ...]
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>>> HauntedBus.__init__.__defaults__
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(['Carrie', 'Dave'],)
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>>> HauntedBus.__init__.__defaults__[0] is bus2.passengers
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True
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"""
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# tag::HAUNTED_BUS_CLASS[]
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class HauntedBus:
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"""A bus model haunted by ghost passengers"""
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def __init__(self, passengers=[]): # <1>
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self.passengers = passengers # <2>
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def pick(self, name):
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self.passengers.append(name) # <3>
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def drop(self, name):
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self.passengers.remove(name)
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# end::HAUNTED_BUS_CLASS[]
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