从JSON文件提取数据时进行编码

Question

I have a simple python script as shown below.

with open(fname, 'r+') as f:
        json_data = json.load(f)
        message = json_data['Info']
        for line in message.split('<br>'):
                if(len(line) < 25):
                        print(line)
                        if ':' in line:
                                k,v = line.strip().split(':')
                                print(k,v)

I get k,v in the following format

(u'Images', u' 23')
(u'Links', u' 225')

The message output looks as below.

Title: Worlds best websit | mywebsite.com
Links: 225
Images: 23
Browser: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 Ubuntu Chromium/41.0.2272.76 Chrome/41.0.2272.76 Safari/537.36
CPUs: 8

I want to extract the data Images:23 and Links:225 and update that to the same json file f in the script.

If I were to do

json_data[k] = v
json.dump(json_data,f)

it corrupts the JSON file.Meaning If I add the above two lines to my code. and do

cat output.json | python -m json.tool

from the command line.I get the following error.

Extra data: line 2 column 1 - line 2 column 45376 (char 2139 - 47514)

I don't understanding what is 'u' in the output? Is it some kind of encoding? If yes how do I process it?

Answer 1

Try this

import sys
import json
import re

fname = sys.argv[1]

openedFile = open(fname, 'r')
content = openedFile.read()
openedFile.close()

pattern = "Links: (\d+?)\nImages: (\d+?)"

matchObj = re.search(pattern, content)
if matchObj:
    openedFile = open(fname, 'w')
    newContent = {'Links': matchObj.group(1), 'Images': matchObj.group(2)}
    json.dump(newContent, openedFile)
    openedFile.close()