Use Python for this problem: (Composition) Write a Pizza class so that this client code works. Please note that it is ok if the toppings are listed in a different order.
Use Python for this problem:
- (Composition) Write a Pizza class so that this client code works. Please note that it is ok if the toppings are listed in a different order.
>>> pie = Pizza()
>>> pie
Pizza('M',set())
>>> pie.setSize('L')
>>> pie.getSize()
'L'
>>> pie.addTopping('pepperoni')
>>> pie.addTopping('anchovies')
>>> pie.addTopping('mushrooms')
>>> pie
Pizza('L',{'anchovies', 'mushrooms', 'pepperoni'})
>>> pie.addTopping('pepperoni')
>>> pie
Pizza('L',{'anchovies', 'mushrooms', 'pepperoni'})
>>> pie.removeTopping('anchovies')
>>> pie
Pizza('L',{'mushrooms', 'pepperoni'})
>>> pie.price()
16.65
>>> pie2 = Pizza('L',{'mushrooms','pepperoni'})
>>> pie2
Pizza('L',{'mushrooms', 'pepperoni'})
>>> pie==pie2
True
The Pizza class should have two attributes(data items):
size – a single character str, one of ‘S’,’M’,L”
toppings – a set containing the toppings. If you don’t remember how to use a set, make sure you look it up in the book. Please note that toppings may be listed in a different order, but hw2TEST.py takes that into account.
The Pizza class should have the following methods/operators):
__init__ - constructs a Pizza of a given size (defaults to ‘M’) and with a given set of toppings (defaults to empty set). I highly recommend you look at the Queue class in the book to see how to get this to work correctly.
setSize – set pizza size to one of ‘S’,’M’or ‘L’
getSize – returns size
addTopping – adds a topping to the pizza, no duplicates, i.e., adding ‘pepperoni’ twice only adds it once
removeTopping – removes a topping from the pizza
price – returns the price of the pizza according to the following scheme:
‘S’: $6.25 plus 70 cents per topping
‘M’: $9.95 plus $1.45 per topping
‘L’: $12.95 plus $1.85 per topping
__repr__ - returns representation as a string – see output sample above. Note that toppings may be listed in a different order.
__eq__ - two pizzas are equal if they have the same size and same toppings (toppings don’t need to be in the same order)
Output for this question:
M
mushroom
onion
garlic
L
calamari
garlic
S
above lines are user inputs to be used for code
that requires user input
>>> from hw8 import *
##### Pizza #####
>>> pie = Pizza()
>>> pie
Pizza('M',set())
>>> pie.setSize('L')
>>> pie.getSize()
'L'
>>> pie.addTopping('pepperoni')
>>> pie
Pizza('L',{'pepperoni'})
>>> pie.addTopping('anchovies')
>>> pie.addTopping('mushrooms')
>>> pie==Pizza('L',{'anchovies', 'mushrooms', 'pepperoni'})
True
>>> pie.addTopping('pepperoni')
>>> pie==Pizza('L',{'anchovies', 'mushrooms', 'pepperoni'})
True
>>> pie.removeTopping('anchovies')
>>> pie==Pizza('L',{'mushrooms', 'pepperoni'})
True
>>> pie.price()
16.65
Note: In the following code,
p==p2 shoudl be False. If True
than they are sharing the same set (or list) of toppings
You need to make sure that the set() constructor is
called in all cases in the body of the Pizza
constructor. See course notes for the Queue class.
>>> p = Pizza()
>>> p2 = Pizza()
>>> p.addTopping('mushroom')
>>> p2.addTopping('onion')
>>> p.addTopping('mushroom')
>>> p
Pizza('M',{'mushroom'})
>>> p2
Pizza('M',{'onion'})
>>> p==p2 # see note in TEST file
False
>>>
# reroute stdin #
code below directs input to be received from above
should not cause an error
>>> import sys
>>> si = sys.stdin
>>> sys.stdin = open('hw8TEST.py')
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