在author.json的末尾添加换行符的最佳方法是什么？

#!/usr/bin/env python

import json

with open('input.json','r') as handle:
    data = json.load(handle)

output = open('author.json','w')

author = {}

for key,value in data.items():
    if key == 'id':
        author['id'] = value


output.write(json.dumps(author,indent=4))