如何将json转换成单头多值的csv？

import json
import csv

def json_to_csv(json_data, csv_file):
    # 解析JSON数据
    data = json.loads(json_data)

    # 提取字段和值
    fields = list(data[0].keys())
    values = [list(obj.values()) for obj in data]

    # 创建CSV文件并写入数据
    with open(csv_file, 'w', newline='') as file:
        writer = csv.writer(file)
        
        # 写入表头
        writer.writerow(fields)
        
        # 写入数据
        writer.writerows(values)

    print("JSON转换成CSV成功！")

# 示例JSON数据
json_data = '''
[
    {
        "name": "John",
        "age": 30,
        "city": "New York"
    },
    {
        "name": "Alice",
        "age": 25,
        "city": "San Francisco"
    },
    {
        "name": "Bob",
        "age": 35,
        "city": "Seattle"
    }
]
'''

# 转换JSON为CSV
json_to_csv(json_data, "output.csv")