Python - 计算 JSON 中值组合的出现次数

Question

I'm using python to try and parse a JSON file. Similar to this question , I want to count the number of occurrences for each combination of 2 values in the file:

Example JSON:

{ 
"first": "John",
"last": "Smith"
},
{ 
"first": "Adam",
"last": "Smith"
},
{ 
"first": "Adam",
"last": "Doe"
},
{ 
"first": "John",
"last": "Smith"
}

Desired Output would calculate something like this (less concerned about format more about count values and associated elements):

{ 
"first": "John", "last": "Smith", "count": 2
},
{ 
"first": "Adam", "last": "Smith", "count": 1
},
{ 
"first": "Adam", "last": "Doe", "count": 1
}

I've tried the below but it obviously only counts the unique "first" values and I'm not able to find a way to consider the second attribute "last" as well.

import json
from json import load
from collections import Counter

f = open('/PathToFile')
data = load(f)
c = Counter(i ['first'] for i in data)
print(c)

Answer 1

You can count the tuples (first,last) in your counter:

Counter((i['first'], i['last']) for i in data)