Python error when writing a class?

Question

I am working on the following problem:

Write a shopping cart class to implement a shopping cart that you often find on websites where you could purchase some goods. Think about what things you could store in a cart and also what operations you could perform on the cart. To simplify matters, you could consider the website to be an electronics e-store that has goods like flat-panel TVs, radios, iPods, camcorders, and so on.

This is my code so far:

class ShoppingCart(object):
    def __init__(self, name = "", address = ""):
        self.items = []
        self.total = 0
        self.shopper = name
        self.address = address

    def get_address(self):
        return self.address
    def get_address(self,address):
        self.address = address

    def add_item(self, T):
        "Add tuple(name, quantity, price, ID)"
    self.items.append(T)
    self.total = sum(t[2] for t in self.items)

    def delete_item(self, T):
        "Delete tuple(name, quantity, price, ID)"
        if T in self.items:
            self.items.remove(T)
            self.total = sum([t[2]] for t in self.items)

    def print_cart(self):
        print("\n cart:")
        print("\t", "Item", \t\, "price", "quantity")

    for T in self.items:
        print("\t", T[0],"\t", T[2], "\t", T[1])
        print("\n Total:", self.total)


    def test_cart():
        "Demonstrate use of class"
        s = ShoppingCart('Rich')
        s.add_item(("iPod Nano", 1, 150.00, '12345'))
        s.add_item(("The Holiday (DVD)", 2, 18.00, '14443'))
        s.set_address('123 Timber, St. Louis, MO, 63130')
        s.print_cart()

test_cart()

I get an error saying:

File "<ipython-input-5-b4071917f558>", line 27
    print("\t", "Item", \t\, "price", "quantity")
                                                 ^
SyntaxError: unexpected character after line continuation character

Does anyone know why this error is occurring? Thank you in advance!

Get a new error: NameError Traceback (most recent call last) <ipython-input-14-254519afb7dc> in <module>() 1 #10 ----> 2 class ShoppingCart(object): 3 def __init__(self, name = "", address = ""): 4 self.items = [] 5 self.total = 0 <ipython-input-14-254519afb7dc> in ShoppingCart() 14 def add_item(self, t): 15 "Add tuple(name, quantity, price, ID)" ---> 16 self.items.append(t) 17 self.total = sum(t[2] for t in self.items) 18 NameError: name 'self' is not defined — Allison
– Allison, Commented Dec 20, 2016 at 2:24
You have wrong indentation for the code in add_item(self, T) method. — flowfree
– flowfree, Commented Dec 20, 2016 at 2:30

tupptp · Accepted Answer · 2016-12-20 01:01:00Z

1

Try to add colon:

print("\t", "Item", "\t", "price", "quantity")

And you could use a simple way:

print("\t Item \t price quantity")

answered Dec 20, 2016 at 1:01

tupptp

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4 Comments

Barmar Over a year ago

You added quotes, not colons.

Allison Over a year ago

Thank you so much! I seem to now be getting another error:

Allison Over a year ago

Now getting a new error that says "self" is not defined in lines 2 or 16...any idea why?

SudoKid Over a year ago

You have bad indentations in your add_item method.

kjpc-tech · Accepted Answer · 2016-12-20 00:57:33Z

0

The answer lies in the error message given. You cannot print out \t\. I think you meant "\t".

answered Dec 20, 2016 at 0:57

kjpc-tech

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