如何在python中读取json对象
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how to read json object in python
提问by Bilal Butt
i have json file named "panamaleaks50k.json" . I want to get ['text'] field from json file but it shows me following error
我有一个名为“panamaleaks50k.json”的 json 文件。我想从 json 文件中获取 ['text'] 字段，但它显示以下错误
the JSON object must be str, bytes or bytearray, not 'TextIOWrapper'
JSON 对象必须是 str、bytes 或 bytearray，而不是“TextIOWrapper”
this is my code
这是我的代码
with open('C:/Users/bilal butt/Desktop/PanamalEakJson.json','r') as lst:
b = json.loads(lst)
print(b['text'])
my json file look
我的 json 文件外观
[
{
"fullname": "Mohammad Fayyaz",
"id": "885800668862263296",
"likes": "0",
"replies": "0",
"retweets": "0",
"text": "Love of NS has been shown in PanamaLeaks scandal verified by JIT...",
"timestamp": "2017-07-14T09:58:31",
"url": "/mohammadfayyaz/status/885800668862263296",
"user": "mohammadfayyaz"
},
{
"fullname": "TeamPakistanPTI \u00ae",
"id": "885800910357749761",
"likes": "0",
"replies": "0",
"retweets": "0",
"text": "RT ArsalanISF: #PanamaLeaks is just a start. U won't believe whr...",
"timestamp": "2017-07-14T09:59:29",
"url": "/PtiTeampakistan/status/885800910357749761",
"user": "PtiTeampakistan"
}
]
how i can read all ['text'] and just single ['text'] field?
我如何阅读所有 ['text'] 和单个 ['text'] 字段？
回答by Eugene Yarmash
You should pass the file contents(i.e. a string) to json.loads(), not the file object itself. Try this:
您应该将文件内容（即字符串）传递给json.loads()，而不是文件对象本身。尝试这个：
with open(file_path) as f:
data = json.loads(f.read())
print(data[0]['text'])
There's also the json.load()function which accepts a file object and does the f.read()part for you under the hood.
还有一个json.load()函数，它接受一个文件对象并在f.read()幕后为你做这部分。
回答by Charles Duffy
Use json.load(), not json.loads(), if your input is a file-like object (such as a TextIOWrapper).
如果您的输入是类似文件的对象（例如 TextIOWrapper），请使用json.load()，而不是json.loads()。
Given the following complete reproducer:
给定以下完整的复制器：
import json, tempfile
with tempfile.NamedTemporaryFile() as f:
f.write(b'{"text": "success"}'); f.flush()
with open(f.name,'r') as lst:
b = json.load(lst)
print(b['text'])
...the output is success.
...输出是success。
