JSON操作-对具有相同值的键进行计数，使用计数作为值创建新对象

import json

def count_keys(json_data):
    # 解析JSON数据
    data = json.loads(json_data)
    
    # 计数字典
    count_dict = {}
    
    # 遍历JSON数据
    for key in data:
        # 计数相同值的键
        if data[key] in count_dict:
            count_dict[data[key]] += 1
        else:
            count_dict[data[key]] = 1
    
    # 创建新对象
    new_obj = {}
    for key, value in count_dict.items():
        new_obj[key] = value
    
    # 将新对象转换为JSON字符串
    new_json = json.dumps(new_obj)
    
    return new_json

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

# 调用函数进行计数和创建新对象
new_json_data = count_keys(json_data)

print(new_json_data)