dict to json file python

stackoverflow.com › questions › 17043860 › how-to-dump-a-dict-to-a-json-file

import json
with open('result.json', 'w') as fp:
    json.dump(sample, fp)

This is an easier way to do it.

In the second line of code the file result.json gets created and opened as the variable fp.

In the third line your dict sample gets written into the result.json!

Answer from moobi on Stack Overflow

Stack Overflow

stackoverflow.com › questions › 17043860 › how-to-dump-a-dict-to-a-json-file

python - How to dump a dict to a JSON file? - Stack Overflow

Top answer

1 of 8

815

import json
with open('result.json', 'w') as fp:
    json.dump(sample, fp)

This is an easier way to do it.

In the second line of code the file result.json gets created and opened as the variable fp.

In the third line your dict sample gets written into the result.json!

2 of 8

60

Combine the answer of @mgilson and @gnibbler, I found what I need was this:

d = {
    "name": "interpolator",
    "children": [{
        'name': key,
        "size": value
        } for key, value in sample.items()]
    }
j = json.dumps(d, indent=4)
with open('sample.json', 'w') as f:
    print >> f, j

It this way, I got a pretty-print json file. The tricks print >> f, j is found from here: http://www.anthonydebarros.com/2012/03/11/generate-json-from-sql-using-python/

KDnuggets

kdnuggets.com › convert-python-dict-to-json-a-tutorial-for-beginners

Convert Python Dict to JSON: A Tutorial for Beginners - KDnuggets

So each book record is in a Python dictionary with the following keys: title, author, publication_year, and genre. When calling json.dumps(), we set the optional indent parameter—the indentation in the JSON string as it helps improve readability (yes, pretty printing json we are ??):

Discussions

How to append an dictionary into a json file?

Your problem is not appending strings/jsons to a file. Your problem is later on reading it. json files usually hold ONE json object, not many concatenated objects. You can create a list, and have you dictionaries be items in that list, and then append to it, and dump the entire list as JSON to have multiple dictionaries stored, but eventually its one JSON object. If you want to modify/append a json object in a file, you read it first, load/loads, change it however you want, and write it back. # load it with open("index.json" , "r") as json_file: file_data = json.loads(json_file.read()) # change it file_data.append(dict) # write it all back with open("index.json" , "w") as json_file: json_file.write(json.dumps(file_data)) (Obviously above code assumes you already have a list dumped as a json object in index.json) More on reddit.com

r/learnpython

2

1

September 2, 2023

python - Converting dictionary to JSON - Stack Overflow

The JSON is loaded into a new variable not because it is new information, but to show that the values in the new dictionary, i.e. after the JSON encode and decode round-trip, are identical. 2019-03-22T10:12:06.877Z+00:00 ... you can dump as json file too, like this with open('r.json', 'w') ... More on stackoverflow.com

stackoverflow.com

convert list of dictionary to list of json objects

Json.dumps will convert the dictionary to a string but the string is valid JSON. You see the single quotes since Python is indicating this is a string (and double quotes is being used internally). More on reddit.com

r/learnpython

7

2

October 13, 2022

JSON Effectively is a Dictionary? Change My Mind

It’s essentially a mix of dictionaries and lists. A JSON object is similar to a dictionary, and a JSON array is similar to a list. Pretty much any JSON data structure can be translated into a complex Python data object. More on reddit.com

r/learnpython

7

0

December 17, 2022

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