使用python字典创建的嵌套json

Question

我有在多个层次上运行的for循环。循环的每一层都会返回一个需要放入层次结构中的json。

output = {}
for a in alist:
  aid, ajson = hit_api(url1)
  output[aid] = ajson
  for b in blist:
    bid, bjson = hit_api(url2)
    output[aid][bid] = bjson -- this is where we are getting error

错误如下

Traceback (most recent call last):
  File "Test.py", line 80, in <module>
    output[aid][bid] = bjson 
TypeError: 'unicode' object does not support item assignment

我们需要在for循环的基础上创建一个嵌套层次结构的最终json。就像这样

aid:ajson 
  |
  ---bid:bjson
      |
       --- cid:cjson
             |
             etc. 

Answer 1

看起来ajson是一个字符串。您可能想要解析这个。您可以使用python标准库json并调用json.loads(ajson)

示例：

import json
output = {}
for a in alist:
  aid, ajson = hit_api(url1)
  output[aid] = json.loads(ajson)
  for b in blist:
    bid, bjson = hit_api(url2)
    output[aid][bid] = json.loads(bjson)