尝试编写 json 文件时抛出错误“不可 JSON 序列化”

Question

我正在尝试重现像flare.json 这样的json 文件，而我的名字就像IndicatorCode，所以我正在尝试构建一个dictTree 并重现上面提到的json 文件，以及我的代码去这里：

import numpy as np
import pandas as pd
import json
li = [];
dictTree = {}
out = {"name":'Indicators', 'children':[]};
dic = pd.read_csv('../dictTree.csv')
dicta = {}
for i in range(len(dic)):
    dicta[dic["IndicatorCode"][i]] = dic["IndicatorName"][i];
    li.append(dic["IndicatorCode"][i])
for x in li:
    i = 0
    k = 0
    d = dictTree
    while k < 2:
        s = ''
        while x[i] != '.':
            s += x[i]
            i = i+1
        i=i+1
        k= k+1
        if s not in d:
            d[s] = {}
        #print s
        d = d[s]
    s = ''
    while i < len(x) and x[i] != '.':
        s += x[i]
        i = i+1
    if s not in d:
        d[s] = []
    d[s].append({'Name':x,"info":dicta[x]})
level1 = out['children']
for x in dictTree:
    level2 = []
    level1.append({"name":x,"children":level2})
    dictlevel2 = dictTree[x]
    for y in dictlevel2:
        level3 = []
        level2.append({'name':y,'children':level3})
        dictlevel3 = dictlevel2[y]
        for z in dictlevel3:
            level3.append({'name':z,'children':dictlevel3[z]})
with open('dictTree.json','w') as f:
    json.dumps(f,out)

错误是这样的：

Traceback (most recent call last):
File "produceTreeJson.py", line 46, in <module>
    json.dumps(f,out)
  File "/Users/Peter/anaconda/lib/python2.7/json/__init__.py", line 250, in dumps
    sort_keys=sort_keys, **kw).encode(obj)
  File "/Users/Peter/anaconda/lib/python2.7/json/encoder.py", line 207, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/Users/Peter/anaconda/lib/python2.7/json/encoder.py", line 270, in iterencode
    return _iterencode(o, 0)
  File "/Users/Peter/anaconda/lib/python2.7/json/encoder.py", line 184, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <open file 'dictTree.json', mode 'w' at 0x107b43030> is not JSON serializable

为了简化我的问题，我只是使用简化的输出数据重现如下错误：

>>> z = {'name': 'indicator', 'children': [{'name': '1','size':1}, {'name':2,"size" :2}]}
>>> with open('test.json','w') as f:
...     json.dump(f,z)

然后我得到同样的错误：TypeError: <open file 'test.json', mode 'w' at 0x1032c66f0> is not JSON serializable

请帮帮我，谢谢~

Answer 1

在示例代码中

with open('test.json','w') as f:
    json.dump(f,z)

你应该用z交换f，函数的参数是（对象，输出文件）。