如何在json中按值对字典键进行分组

import json

def group_by_value(json_data):
    data = json.loads(json_data)
    result = {}

    for key, value in data.items():
        if value not in result:
            result[value] = [key]
        else:
            result[value].append(key)

    return result

# 示例JSON数据
json_data = '{"key1": "value1", "key2": "value2", "key3": "value1", "key4": "value3"}'

# 调用函数进行按值分组
grouped_data = group_by_value(json_data)

# 打印结果
for value, keys in grouped_data.items():
    print(f"值为 {value} 的键有：{keys}")

值为 value1 的键有：['key1', 'key3']
值为 value2 的键有：['key2']
值为 value3 的键有：['key4']