On Tue, Nov 29, 2011 at 2:31 PM, ADRIAN KELLY <kellyadr...@hotmail.com>wrote:
> i am trying to create a program that will allow users to enter items and
> their prices; should i be looking at a list, tuple or what?
>
The entering part isn't as important as how you want to display the data.
For instance, here's a program that allows the user to input an unlimited
amount of data (using Python 3.x):
while input("Enter q to quit, or an item: ").lower() not in ('q', 'quit',
'goodbye'):
input("Enter the price: ")
Of course it doesn't store the data, so it's pretty useless. But it does
allow the user to input whatever they want.
If you wanted to simply create a collection of items you could do it as a
list with alternating values:
inventory = ['Crunchy Frog', 4.13, 'Anthrax Ripple', 12.99999999999,
'Spring Surprise', 0.00]
for x in range(0, len(inventory)-1, 2):
print(inventory[x], inventory[x+1])
Or as a list of tuples:
inventory = [('Norwegian Blue', 500.00), ('Slug', 500.00), ('Cage',
50.00)]
for item in inventory:
print(item[0], item[1])
Or a dictionary:
inventory = {'Spam':5.00, 'Spam on eggs':10.00, 'Spam on Spam':7.50}
for item, price in inventory.items():
print(item, price)
Or if you wanted to get ridiculous, you could go with a list of classes:
class Item:
def __init__(self, desc='', price=0.00):
self.desc = desc
self.price = price
def __repr__(self):
return str(self)
def __str__(self):
return "{0} - {1}".format(self.desc, self.price)
inventory = [Item('Lumberjack', 5.5), Item('Tree', 50), Item('Flapjack',
0.5)]
for item in inventory:
print(item)
It just depends on how complex you want to get!
HTH,
Wayne
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