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I have text file who contains a list of objects.

{ a:"1", b:"2", c: "3"}{ a:"1", b:"2", c: "3"}{ a:"1", b:"2", c: "3"}

I want to make it valid Json file. For instanse:

[{ a:"1", b:"2", c: "3"},{ a:"1", b:"2", c: "3"},{ a:"1", b:"2", c: "3"}]

The file is very big - 600mb. I need to do this with languages who can change files. I tried to find solution but I couldn't.

I have text file who contains a list of objects.

{ a:"1", b:"2", c: "3"}{ a:"1", b:"2", c: "3"}{ a:"1", b:"2", c: "3"}

I want to make it valid Json file. For instanse:

[{ a:"1", b:"2", c: "3"},{ a:"1", b:"2", c: "3"},{ a:"1", b:"2", c: "3"}]

The file is very big - 600mb. I need to do this with languages who can change files. I tried to find solution but I couldn't.

• javascript
• php
• python
• json

Share Improve this question Follow asked Jul 19, 2017 at 13:35 Yavor StoychevYavor Stoychev 3311 gold badge11 silver badge55 bronze badges 5

• What is your array? please show your array. – Virb Commented Jul 19, 2017 at 13:36
• Can these objects have nested objects inside them? – abhishekkannojia Commented Jul 19, 2017 at 13:36
• 2 Add [, ] and replace }{ with },{? – emed Commented Jul 19, 2017 at 13:41
• 1 this will be a nightmare if we need to write a parser yourself it will help if the next element have a new line between them if not you need to detect the start of the curly bracket and end of the curly bracket – Hamuel Commented Jul 19, 2017 at 13:41
• in python: read file and replace }{ with },{ => re.sub(r'}{', '},{', file_text) – Hadi Farhadi Commented Jul 19, 2017 at 14:06

Add a ment  | 

5 Answers 5

Sorted by: Reset to default 3

KISS: replace }{ with },{ and wrap in []

A sloppy but simple solution in Python:

import json
tmp = '{ "a":"1", "b":"2", "c": "3"}{ "a":"1", "b":"2", "c": "3"}{ "a":"1", "b":"2", "c": "3"}' # test string
tmp = tmp.replace('}{', '},{') # replace '}{' with '},{'
tmp = '[' + tmp + ']' # add brackets around it
json_string = json.loads(tmp) # confirm that it's valid json
print(json_string) # print the json_string

will print

[{'a': '1', 'b': '2', 'c': '3'}, {'a': '1', 'b': '2', 'c': '3'}, {'a': '1', 'b': '2', 'c': '3'}]

Hello I saw this help can serve as a contribution. inside the first def ma_json add; and the structure_json adds [] to everything

def ma_json():

with open("file1.json", "r+") as f:
    old = f.read()
    f.seek(0)  # rewind
    f.write(old.replace('}{', '},{'))
    f.close

def structure_json():
  with open("file1.json", "r+") as f:
    old = f.read()
   with open("file2.json", "w") as r:
    tmps = '[' + str(old) + ']'
    json_string = json.loads(tmps)

    json.dump(json_string, r, indent=2)
    f.close

not a best solution but it works follow below steps

1. if the input is in object format then convert into string json.stringify()
2. replace "}{" with "},{" and append add open and close brackets at the start and end of the string
3. now convert string to object.

u can use like this

  [
    { "a":"1", 
      "b":"2", 
      "c": "3"
    },
    { "a":"1", 
      "b":"2", 
      "c": "3"
    },
    { "a":"1", 
      "b":"2", 
      "c": "3"
    }
 ]

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