Question

我想提取json文件的所有值。例如，我有这个对象，我想获得所有“文本”值。我怎样才能做到这一点？

  list= [
    {
    "text": "contact solution - COUPON",
    "listId": "1",
    "id": "4",
    "leaf": "true" 
    },
    {
    "text": "Falafel (bulk)",
    "listId": "1",
    "id": "161",
    "leaf": "true" 
    },
    {
    "text": "brita filters",
    "listId": "1",
    "id": "166",
    "leaf": "false" 
    }

输出：

listText = ["contact solution - COUPON","Falafel (bulk)","brita filters"]

更新：

我从CSV文件中获取这些数据。

text,listId,id,leaf, jsonfile
"1","is","an","example","{ "text": "contact solution - COUPON", "listId": "1", "id": "4","leaf": "true"}"
"2","is","an","example"," { "text": "Falafel (bulk)","listId": "1", "id": "161", "leaf": "true"  }"
"3","is","an","example"," { "text": "Falafel (bulk)","listId": "1","id": "161","leaf": "true" }"
"4","is","an","example"," { "text": "brita filters","listId": "1","id": "166","leaf":"false" }"
"5","is","an","example"
"6","is","an","example"
"7","is","an","example"

使用Pandas，我将列的项目转换为列表。

with open("data/output.csv", "rb") as csvfile:
    df = pd.read_csv(csvfile)
    addData = df.Address
        listfiels= df.jsonfile

现在，我想在Json文件中获取一个“text”列表，以这种方式存储其他json文件。我需要YYY列表，每次都选择XXX。

output = [  {
            "type": "User",
            "name": {
                "status": "Single",
                "adress":coordinates
                "details": XXXX }
            }
          for da,coordinates in zip(textData, addData,YYYY )]

这是否有意义？我使用JS做了这个没有问题。

 var globalData = data.map(function(d) {
            return JSON.parse(d.Jsonfile);
        });

我可以毫无问题地访问文本字段。

UPDATE2： j = json.loads（listfiels [0]）打印（j [ '文本']）

我可以成功打印：“联系方式 - COUPON”

Answer 1

使用列表理解：

>>> lst = [
...     {
...         "text": "contact solution - COUPON",
...         "listId": "1",
...         "id": "4",
...         "leaf": "true" 
...     },
...     {
...         "text": "Falafel (bulk)",
...         "listId": "1",
...         "id": "161",
...         "leaf": "true" 
...     },
...     {
...         "text": "brita filters",
...         "listId": "1",
...         "id": "166",
...         "leaf": "false" 
...     }
... ]
>>> [d['text'] for d in lst]
['contact solution - COUPON', 'Falafel (bulk)', 'brita filters']

将map与operator.itemgetter一起使用：

>>> import operator
>>> list(map(operator.itemgetter('text'), lst)) # Omit `list` in Python 2.x
['contact solution - COUPON', 'Falafel (bulk)', 'brita filters']

Answer 2

   jsonString=open("file.json").read()
   import json
   myList = [e['text'] for e in json.loads(jsonString)]

Python：在Json文件中获取一个属性（按值）的项目

2 个答案: