擅长:python、mysql、java
<p>此代码段向旧节点添加新值(z=12)并更新现有节点y</p>
<pre><code>import json
from collections import defaultdict
jsonData = defaultdict(list)
with open('c:/temp/data.json', 'r') as f:
jsonData = json.load(f)
for item in jsonData['nodes']:
if item['id']=='node5':
item['y'] = 5
item['z'] = 12
</code></pre>