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Converting dictionary to JSON [duplicate]

stackoverflow.com › questions › 26745519 › converting-dictionary-to-json

json.dumps() converts a dictionary to str object, not a json(dict) object! So you have to load your str into a dict to use it by using json.loads() method

See json.dumps() as a save method and json.loads() as a retrieve method.

This is the code sample which might help you understand it more:

import json

r = {'is_claimed': 'True', 'rating': 3.5}
r = json.dumps(r)
loaded_r = json.loads(r)
loaded_r['rating'] #Output 3.5
type(r) #Output str
type(loaded_r) #Output dict

Answer from Iman Mirzadeh on Stack Overflow

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Python Dictionary To JSON

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stackoverflow.com › questions › 26745519 › converting-dictionary-to-json

python - Converting dictionary to JSON - Stack Overflow

Top answer

1 of 6

855

json.dumps() converts a dictionary to str object, not a json(dict) object! So you have to load your str into a dict to use it by using json.loads() method

See json.dumps() as a save method and json.loads() as a retrieve method.

This is the code sample which might help you understand it more:

import json

r = {'is_claimed': 'True', 'rating': 3.5}
r = json.dumps(r)
loaded_r = json.loads(r)
loaded_r['rating'] #Output 3.5
type(r) #Output str
type(loaded_r) #Output dict

2 of 6

json.dumps() returns the JSON string representation of the python dict. See the docs

You can't do r['rating'] because r is a string, not a dict anymore

Perhaps you meant something like

r = {'is_claimed': 'True', 'rating': 3.5}
json = json.dumps(r) # note i gave it a different name
file.write(str(r['rating']))

Discussions

How to serialize Python dict to JSON - Stack Overflow

If you try to serialize any data type which is not json serializable, you get a TypeError "TypeError: is not JSON serializable". So there should be an intermediate step that converts these non built in data types into Python built in serializable data structure (list, dict, number and string). More on stackoverflow.com

stackoverflow.com

python - How do I put a dictionary into JSON without the escape slash - Stack Overflow

Then you need to pass your printJSON function a dict, not a string, which is what you are currently doing. ... Thanks, Scott, for including a minimal reproducible example in your question. ... The reason is because you are dumping your JSON data twice. Once outside the function and another ... 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

October 13, 2022

What's the real difference between a dict and a JSON object (coming from JS background)

JSON is a file format that uses a key - value pair syntax. Keys can only be unicode strings surrounded by doubel quotes, like "name". Values can be: Only certain number formats like 5, -5, 5.5, 1.0E+5 The values true, false, and null Unicode strings in double quotes, like "hello" Array: an ordered, comma separated list of any valid value type Object: a collection of key-value pairs that itself confirms to the JSON syntax ---------------------------------- A Python dict is an object that can have any hashable object as a key. It’s more flexible. A number, a decimal, a string, a tuple, etc can be a key. A Python dict value has no limits (that I know of). It can be any Python object. A string, a number, a function, another dict, a whole entire module. You name it. ---------------------------------- What makes JSON so powerful is that it's an agreed upon format. No matter if you're using Python, Java, PHP, or Ruby, if someone sends your app data in the JSON format, the shape is predictable so your programming language of choice will be able to parse it. How Java, Python, JavaScript, etc. decide to parse JSON into an object will be a little different depending on the language. Python can decode a string or file that confirms to the JSON format into a Python dict. ---------------------------------- One nuance that I wanted to point out is even though JSON stands for "JavaScript Object Notation", it is NOT JavaScript. JSON is a file format/data exchange format. Someone said "So 1 and 1.0 are two different values in Python, while in JSON, they would be the same." That's not quite true. JSON is only a format. 1 and 1.0 in a json file are no more "the same" as 1 and 1.0 are in a txt file. What that person probably meant is that 1 and 1.0 are the same in JavaScript, but that's besides the point because it's important to remember that JSON is NOT JavaScript, it's a format. More on reddit.com

r/learnpython

October 9, 2022

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