Python中的自定义JSON sort_keys顺序

data = {
    "name": "John",
    "age": 30,
    "city": "New York"
}

import json

# 未排序的JSON字符串
json_string = json.dumps(data)
print(json_string)  # 输出：'{"name": "John", "age": 30, "city": "New York"}'

# 排序后的JSON字符串
sorted_json_string = json.dumps(data, sort_keys=True)
print(sorted_json_string)  # 输出：'{"age": 30, "city": "New York", "name": "John"}'

def custom_sort_key(key):
    order = {"city": 0, "age": 1, "name": 2}
    return order.get(key, len(order))

custom_sorted_json_string = json.dumps(data, sort_keys=True, key=custom_sort_key)
print(custom_sorted_json_string)  # 输出：'{"city": "New York", "age": 30, "name": "John"}'