将JSON数据分组到多个键上并保留这些键

[
  {
    "name": "Alice",
    "age": 25,
    "gender": "female",
    "city": "New York"
  },
  {
    "name": "Bob",
    "age": 30,
    "gender": "male",
    "city": "San Francisco"
  },
  {
    "name": "Charlie",
    "age": 35,
    "gender": "male",
    "city": "New York"
  },
  {
    "name": "Diana",
    "age": 28,
    "gender": "female",
    "city": "San Francisco"
  }
]

import itertools

data = [
  {
    "name": "Alice",
    "age": 25,
    "gender": "female",
    "city": "New York"
  },
  {
    "name": "Bob",
    "age": 30,
    "gender": "male",
    "city": "San Francisco"
  },
  {
    "name": "Charlie",
    "age": 35,
    "gender": "male",
    "city": "New York"
  },
  {
    "name": "Diana",
    "age": 28,
    "gender": "female",
    "city": "San Francisco"
  }
]

# 根据城市和性别进行分组
groups = itertools.groupby(data, key=lambda x: (x["city"], x["gender"]))

# 打印分组结果
for key, group in groups:
    print("Group:", key)
    for item in group:
        print(item)
    print()

Group: ('New York', 'female')
{'name': 'Alice', 'age': 25, 'gender': 'female', 'city': 'New York'}

Group: ('San Francisco', 'male')
{'name': 'Bob', 'age': 30, 'gender': 'male', 'city': 'San Francisco'}

Group: ('New York', 'male')
{'name': 'Charlie', 'age': 35, 'gender': 'male', 'city': 'New York'}

Group: ('San Francisco', 'female')
{'name': 'Diana', 'age': 28, 'gender': 'female', 'city': 'San Francisco'}