如果键值相同，是否合并

Question

roku.json

{
"Chicago":{
"Menu":{
"Strawberry Pie":[
{
"item":"Whipping Cream", 
"container":"1 oz cup"
},
{
"item":"Water" ,
"container":"tray 1"  
},
{
"item":"Cornstarch",
"container":"tray 1"    
},
{
"item":"Sugar",
"container":"1 oz cup"
},
{
"item":"fresh strawberries",
"container":"2 oz cup"
}
]
}
}
}

我的代码

import json
with open('roku.json') as file: 
package_json = json.load(file)
menu = package_json['Chicago']['Menu']['Strawberry Pie']    
for i in menu:
product = i['item']
container = i['container']
print(product,container)

我想知道是否有人能为我指明正确的方向，如果键值相同，如何连接。我当前的输出是

Whipping Cream 1 oz cup
Water tray 1
Cornstarch tray 1
Sugar 1 oz cup
fresh strawberries 2 oz cup

我希望它是

Whipping Cream & Sugar 1 oz cup
Water & Constarch tray 1
fresh stawberries 2 oz cup

Answer 1

如果你不想让事情过于复杂，那就制作另一个字典，在那里你将存储所有唯一容器的所有产品

container2products = {}
for i in menu:
product = i['item']
container = i['container']
container2products.setdefault(container, [])
container2products[container].append(product)
for container, products_list in container2products.items():
products_str = ' & '.join(products_list) 
print(products_str, container)