how to read in json file in lines

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I got a json file in format like, each record is represented in lines:

{
 "A":0,
 "B":2
}{
 "A":3,
 "B":4
}

how to read it in a list?

If your data is exactly in that format, we can edit it into valid JSON.

import json

source = '''\
{
 "A":0,
 "B":2
}{
 "A":3,
 "B":4
}{
 "C":5,
 "D":6
}
'''

fixed = '[' + source.replace('}{', '},{') + ']'
lst = json.loads(fixed)
print(lst)

output

[{'A': 0, 'B': 2}, {'A': 3, 'B': 4}, {'C': 5, 'D': 6}]

This relies on each record being separated by '}{'. If that's not the case, we can use regex to do the search & replace operation.

how to read in json file in lines, If your data is exactly in that format, we can edit it into valid JSON. import json source = '''\ { "A":0, "B":2 }{ "A":3, "B":4 }{ "C":5, "D":6 } ''' fixed = '[' +  Reading a well-formed JSON lines file is a one-liner in Python. But the file can be broken: cut at some point (this happens when the process writing it is killed), or concatenated from several cut pieces (this happend when the process started appending to the same file again). Handling all this cases is not easy, especially if the file is compressed.

Add [ and ] around your input and try this:

import json
with open('data.json') as data_file:    
    data = json.load(data_file)
    print (data)

This code returns this line

[{'A': 0, 'B': 2}, {'A': 3, 'B': 4}]

when I put this data into the file:

[
{
 "A":0,
 "B":2
},{
 "A":3,
 "B":4
}
]

If you can't edit the file data.json, you can read string from this file, add [ and ] around this string, and call json.loads().

Update: Oh, I see that I added comma separator between JSON files. For initial input this my code doesn't work. But may be it is better to modify generator of this file? (i.e. to add comma separator)

How to load & parse JSON file in python Quick Tips, You need to parse your file line by line: import json data = [] with open ( To read JSON from file, we will be using the JSON file we created in the previous example. First of all, we will create JSONParser instance to parse JSON file. Use FileReader to read JSON file and pass it to parser. Start reading the JSON objects one by one, based on their type i.e. JSONArray and JSONObject.

Untested

import pandas as pd

str = '{"A":0,"B":2}{"A":3,"B":4}'
list(pd.read_json(str))

How to open a JSON file, is a text-based format, and although it may have an encoding associated with it, you should be able to open it in any text editor. Notepad/notepad++, sublime, gedit, kate, vi, emacs, anjuta, or even eclipse(ugh). json.loads(): If you have a JSON string, you can parse it by using the json.loads() method.json.loads() does not take the file path, but the file contents as a string, using fileobject.read() with json.loads() we can return the content of the file.

Read JSON file using Python, How do I open and read a JSON file in Python? Reading JSON from a file. In python read json file is very easy. In this article we will explain how to read a JSON file from the disk and use it in python. What is JSON? JSON is a data exchange format used all over the internet. JSON (JavaScript Object Notation) can be used by all high level programming languages. How to use JSON with python?

Reading JSON file & Text file in Python (Just 2 lines of Code , How do I extract data from a JSON file in Python? In the above program, we have opened a file named person.txt in writing mode using 'w'. If the file doesn't already exist, it will be created. Then, json.dump () transforms person_dict to a JSON string which will be saved in the person.txt file. When you run the program, the person.txt file will be created.

Python Parse multiple JSON objects from file, Python program to read. # json file. import json. # Opening JSON file. f = open Read a file line by line in Python · Javascript | Program to read text File · Python  The easiest way to write your data in the JSON format to a file using Python is to use store your data in a dict object, which can contain other nested dict s, arrays, booleans, or other primitive types like integers and strings. You can find a more detailed list of data types supported here.

Comments
  • If each JSON object were on a separate line, this would be easy. But the data format shown is tricky to handle because each object spans multiple lines, and there isn't a linebreak between the objects.
  • @Jaba This question isn't a duplicate of that one, since the input data of this one has multiple JSON objects joined together with no separators.
  • Is your data exactly like that, with simple string-number pairs, no nesting, and }{ on a line by itself, with no extra whitespace?
  • @PM 2Ring Yes, it has been once each json data per line . But with manul adding data and other option, it finally become this.
  • So, let's formulate your question correctly: you have a concatenation of several JSON files in a one file, isnt't it? And you need to read all these concatenated files, and to save the data somehow. Is it true? If yes, what is the expected result for the example data from your question?
  • yes, thats what i want to express. but the example given by @Jaba is different in my case. I thought I should make a parsing script for the file
  • No, you can use existent parser. I've updated the answer.