AttributeError: 'str' object has no attribute 'size'

[russoj5]

Hi All,

I'm doing a homework assignment and getting some errors when running the doctest. Everything seems to work fine when I manually enter data, but when I run the doctest, I am getting the same 3 errors.

This is the code that I have written for the homework assignment:

#   Pizza()

# **** COMPOSITION ******

class Pizza():
        
    #__init__  *****MODIFY METHOD******

    def __init__(self, s='M', t={}):
        #print('__init__')
        self.size = s
        self.toppings = set(t)
        

    #__repr__    *****RETURN METHOD******

    def __repr__(self):

        return f"Pizza('{self.size}',{self.toppings})"


    #__eq__    ******RETURN METHOD*****

    def __eq__(self,other):

        return self.size == other.size and self.toppings == other.toppings      

    #__setSize__  ****MODIFY METHOD******

    def setSize(self,s):
        self.size = s

    #__getSize__ *****RETURN METHOD*******

    def getSize(self):

        return self.size

    #__addTopping__    ******MODIFY METHOD*****

    def addTopping(self,t):

        #Error - str does not have "add"
        #why is it being passed a string??
            
        self.toppings.add(t)

    #__removeTopping__*****MODIFY METHOD*******

    def removeTopping(self, t):
        
        self.toppings.discard(t)
        

    #__price__    ****** RETURN METHOD ******


    def price(self):

        costDict={'S':0.70,'M':1.45,'L':1.85}

        if self.size == 'S':

            return 6.25 + costDict.get(self.size) * len(self.toppings)
            
        
        elif self.size == 'M':
            
            return 9.95 + costDict.get(self.size) * len(self.toppings)
        else:

            return 12.95 + costDict.get(self.size) * len(self.toppings)
        
            
def orderPizza():
    
    print('Welcome to Python Pizza!')
    #print(input('What size pizza would you like (S,M,L): '))# check that it receives input

    size = input('What size pizza would you like (S,M,L): ')
    #print(p.setSize)

    p=Pizza(size,t={})

    while True:

        newTopping = input('Type of topping to add (or Enter quit): ')
        #print(p)


        if newTopping == '':
            break
        else:
            p.addTopping(newTopping)
            #print(p)
    
    
    print('Thanks for ordering!')
    
    return f"Your pizza costs ${p.price()})"



if __name__=='__main__':
    import doctest
    print( doctest.testfile( 'hw8TEST.py'))

This is the doctest code that is running and causing the errors:

##### orderPizza #####
>>> orderPizza()==Pizza('M',{'garlic', 'onion', 'mushroom'})
Welcome to Python Pizza!
What size pizza would you like (S,M,L): Type topping to add (or Enter to quit): Type topping to add (or Enter to quit): Type topping to add (or Enter to quit): Type topping to add (or Enter to quit): Thanks for ordering!
Your pizza costs $14.299999999999999
True
>>> orderPizza()==Pizza('L',{'calamari', 'garlic'})
Welcome to Python Pizza!
What size pizza would you like (S,M,L): Type topping to add (or Enter to quit): Type topping to add (or Enter to quit): Type topping to add (or Enter to quit): Thanks for ordering!
Your pizza costs $16.65
True
>>> orderPizza()==Pizza('S',set())
Welcome to Python Pizza!
What size pizza would you like (S,M,L): Type topping to add (or Enter to quit): Thanks for ordering!
Your pizza costs $6.25
True

#stdin back #

put stdin back to original, again, shouldnt cause error
>>> sys.stdin = si  # return stdin

This is the typical error:

Output:
File "/Users/jamesrusso/Desktop/DePaul/CSC 401 Introduction to Programming/Week 8/hw8TEST.py", line 77, in hw8TEST.py
Failed example:
    orderPizza()==Pizza('M',{'garlic', 'onion', 'mushroom'})
Exception raised:
    Traceback (most recent call last):
      File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/doctest.py", line 1336, in __run
        exec(compile(example.source, filename, "single",
      File "<doctest hw8TEST.py[26]>", line 1, in <module>
        orderPizza()==Pizza('M',{'garlic', 'onion', 'mushroom'})
      File "/Users/jamesrusso/Desktop/DePaul/CSC 401 Introduction to Programming/Week 8/hw8.py", line 32, in __eq__
        return self.size == other.size and self.toppings == other.toppings
    AttributeError: 'str' object has no attribute 'size'

It looks like it doesnt like the __eq__ function in the Pizza() class. I've been playing around with it for a few hours and not sure what I'm doing wrong. I'm at the point where I've been guessing at different solutions without any real reason for trying them and feel like I don't have a good enough understanding of the material at this point because I'm stuck.

Any suggestions on what I should look at or hints to get me moving in the right direction would be very helpful and appreciated.