Hey Everybody,
I took Kent's advice and changed the design of the script. Tell me what you
think!
#!/usr/bin/python
class Widget(object):
def __init__(self,widget_number):
self.widget_number = widget_number
#print "Created Widget %d" % widget_number
class Cart(object):
def __init__(self,name):
self.name = name
print "Created " + self.name
def add_widgets(self,number_widgets):
for n in range(number_widgets):
widget = Widget(n + 1)
print "I put %d widgets in the cart!" % number_widgets
class User(object):
def __init__(self,name="John Doe"):
self.name = name
print "Hello " + self.name + "!"
self.cart_number = 0
self.cart_list = []
self.cart_dict = {}
def buy_widgets(self,cart_name,number_widgets):
cart = Cart(cart_name)
self.cart_number = self.cart_number + 1
self.cart_list.append(cart.name)
cart.add_widgets(number_widgets)
self.cart_dict[cart_name] = number_widgets
def carts_info(self):
print "You have %d carts!" % self.cart_number
for i, c in enumerate(self.cart_list):
print "%d) %s has %d widgets" % (i+1, c, self.cart_dict[c])
if __name__ == '__main__':
user_name = raw_input("Enter your name: ")
user = User(user_name)
print "You can "
print "1) Buy a widget"
print "2) List your carts"
print "3) Quit"
while True:
while True:
choice = raw_input("Pick an option: ")
try:
choice_int = int(choice)
break
except ValueError:
print "Invalid choice!"
print "Try again!"
if choice_int == 1:
cart_name = raw_input("Enter the name of your cart: ")
number_widgets = raw_input("How many widgets do you want? ")
number_widgets_int = int(number_widgets)
user.buy_widgets(cart_name,number_widgets_int)
elif choice_int == 2:
user.carts_info()
elif choice_int == 3:
print "Goodbye!"
break
else:
print "Invalid Choice!"
print "Try Again!"
--- On Tue, 8/12/08, Kent Johnson <[EMAIL PROTECTED]> wrote:
> From: Kent Johnson <[EMAIL PROTECTED]>
> Subject: Re: [Tutor] ecommerce.py
> To: [EMAIL PROTECTED]
> Cc: tutor@python.org
> Date: Tuesday, August 12, 2008, 4:01 AM
> On Tue, Aug 12, 2008 at 1:41 AM, Christopher Spears
> <[EMAIL PROTECTED]> wrote:
> > I am not sure how to handle putting Widgets into a
> Cart. Somehow, I need the user to be able to select the
> Cart he or she wants and then put Widgets in it. Any hints?
>
> You figured out how to put a Cart in a User, I guess you
> want
> something similar - a cart should have a list of widgets.
>
> Maybe the problem asks for it, but usually an online shop
> has just one
> cart per user and the cart is created for you when you ask
> to buy
> something. If you use that design it might be simpler.
>
> Kent
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