python嵌套dictionaries统计

最新推荐文章于 2025-12-22 08:30:00 发布

原创最新推荐文章于 2025-12-22 08:30:00 发布 · 215 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#python #dictionary

python 专栏收录该内容

36 篇文章

订阅专栏

本文探讨了如何遍历和更新Python中的嵌套字典，适合正在学习Python字典操作的读者。

关注微信公众号(瓠悠笑软件部落)，一起学习，一起摸鱼
huyouxiao.com

allGuests = {'Alice': {'apples': 5, 'pretzels': 12}, 'Bob': {'ham sandwiches': 3, 'apples': 2}, 'Carol': {'cups': 3, 'apple pies': 1}}

def totalBrought(guests, item):
    numBrought = 0
    for k, v in guests.items():
        numBrought = numBrought + v.get(item, 0)
    return numBrought

print('Number of things being brought:')
print(' - Apples         ' + str(totalBrought(allGuests, 'apples')))
print(' - Cups           ' + str(totalBrought(allGuests, 'cups')))
print(' - Cakes          ' + str(totalBrought(allGuests, 'cakes')))
print(' - Ham Sandwiches ' + str(totalBrought(allGuests, 'ham sandwiches')))
print(' - Apple Pies     ' + str(totalBrought(allGuests, 'apple pies')))


# outputs
########################################
Number of things being brought:
 - Apples         7
 - Cups           3
 - Cakes          0
 - Ham Sandwiches 3
 - Apple Pies     1
########################################

dictionary 的遍历与更新

inventory = {'arrow': 12, 'gold coin': 42, 'rope': 1, 'torch': 6, 'dagger': 1}
dragonLoot = ['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby']
inv = {'gold coin': 42, 'rope': 1}

def displayInventory(dictionary):
    print('Inventory:')
    total_items = 0
    for k, v in dictionary.items():
       print(str(v) + '   ' + k)  
       total_items += v 
    print('Total number of items:' + str(total_items))

def addToInventory(inventory, addedItems):
   for item in addedItems:
      inventory.setdefault(item, 0)
      new_count = inventory.get(item) + 1
      inventory[item] =  new_count    
   return inventory

displayInventory(inv)
added_inv = addToInventory(inv, dragonLoot)
displayInventory(added_inv)