python3 如何从一组字符中取出其中的一个值

Question

从网页中抓取到了一组字符如b'{"aa":11,"bb":22,"cc":33}'如何取出aa的值

三叔 · Answer

用json里的loads

import json

raw = b'{"aa":11,"bb":22,"cc":33}'
d   = json.loads(str(raw, 'utf-8'))
print(d['aa'])