如何组合两个python字典并创建csv文件？

import csv

dict1 = {'key1': 'value1', 'key2': 'value2'}
dict2 = {'key3': 'value3', 'key4': 'value4'}

combined_dict = {**dict1, **dict2}

with open('output.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerow(combined_dict.keys())
    writer.writerow(combined_dict.values())