python对库存清单进行排序

python 对元组对库存进行排序

# sort an inventory list by item count
# Python24 (needed)  modified by  vegaseat  10may2005
import operator
# create an inventory list of tuples
# each tuple contains the item name and the count of the item
inventory = [('apple', 35),('grape', 967),('banana', 12),('pear', 5),('cumquat', 10)]
print '-'*50  # 50 dashes, cosmetic stuff
print "Original inventory list:"
print inventory
 
# establish the sort key
# each tuple is zero based
# item name = 0 and item count = 1
getcount = operator.itemgetter(1)
print "Inventory list sorted by item count:"
# now sort by item count
sortedInventory = sorted(inventory, key=getcount)
print sortedInventory
# more official look
print "Fruit inventory:"
for item in sortedInventory:
    print "%-10s%6d" % (item[0], item[1])