Work with JSON in Python

Question

{"required_items":[
                   {
                    "filename":"abcd",
                    "no":"3"
                   },
                   {
                    "filename":"abc",
                    "no":"2"
                   }
                  ]}

I am not getting the code of the JSON format in Python - I want to insert the filename and no through a loop.

list_of_other_ids={}
for i in xxxx:    
  entry={}
  entry['filename'] = "XXXX"
  entry['no'] =XX
  list_of_other_ids.append(entry)

I am doing like this... and it fails.

what do you have so far, what's the problem with what you have? — Nicolas78
– Nicolas78, Commented Aug 27, 2010 at 18:23
Please give an example of what you are trying to do or get a colleague who knows English better to help you write your question. I can't even make a good guess at what you are asking. — msw
– msw, Commented Aug 27, 2010 at 18:24
yeah i know...but the problem is that filesname numbers are dictionary object and required items is list when i try to append in list it gives an error TypeError: 'builtin_function_or_method' object is unsubscriptable — goblin2986
– goblin2986, Commented Aug 27, 2010 at 18:34

leoluk · Accepted Answer · 2010-08-27 19:07:15Z

5

# data.txt

{"required_items":[
                   {
                    "filename":"abcd",
                    "no":"3"
                   },
                   {
                    "filename":"abc",
                    "no":"2"
                   }
                  ]}

# parser.py

import json 

data = json.load(open('data.txt'))

for file in data:
    print file['filename']

# This will output:
#  abcd
#  abc

If you want to append new items:

data.append({ 'filename': 'foo',
            'nr': 1 })

json.dump(data, open('data.txt', 'w'))

answered Aug 27, 2010 at 19:07

leoluk

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