1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
# Shopping cart implementation
import uuid
import sys
cartId = "1234"
# Get the shopping cart from the cache
# Return an empty cart if not found
def getcart(id, cache):
cart = cache.get((id,))
if cart is None:
return ()
return cart
# Post a new item to the cart, create a new cart if necessary
def post(collection, item, cache):
id = str(uuid.uuid1())
cart = ((item[0], id, item[2]),) + getcart(cartId, cache)
cache.put((cartId,), cart)
return (id,)
# Find an item in the cart
def find(id, cart):
if cart == ():
return ("Item", "0", ())
elif id == cart[0][1]:
return cart[0]
else:
return find(id, cart[1:])
# Get items from the cart
def get(id, cache):
if id == ():
return ("Your Cart", cartId) + getcart(cartId, cache)
return find(id[0], getcart(cartId, cache))
# Delete items from the cart
def delete(id, cache):
if id == ():
return cache.delete((cartId,))
return True
# Return the price of an item
def price(item):
return float(filter(lambda x: x[0] == "'price", item[2])[0][1])
# Sum the prices of a list of items
def sum(items):
if items == ():
return 0
return price(items[0]) + sum(items[1:])
# Return the total price of the items in the cart
def total(cache):
cart = getcart(cartId, cache)
return sum(cart)
|
