当试图写一个json文件时抛出一个错误“not JSON serializable”

Question

我试图重现一个像flare.json这样的json文件，而且我的名字就像IndicatorCode，所以我试图构建一个dictTree和重现上面提到的JSON文件，我的代码放在这里：

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) 

和错误是这样的：

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，我只是重现错误，如遵循使用简化输出数据：

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

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

请帮助我，THX〜

Answer 1

在示例代码

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

你应该z交换f，函数的参数是（对象，输出文件）。