How can I add an item in a list from a JSON file in Python?

Question

Is there any way to append a JSON file list?

Here is my JSON file content:

{"language": "['English', 'French']", "bank": 50}

I would like to add the string "Spanish" to the language list.

How can I do it?

import json

with open("example.json", "r") as jsonFile:
    data = json.load(jsonFile)

add list(data["language"]['Spanish'])

with open("example.json", "w") as jsonFile:
    json.dump(data, jsonFile)

Asked By: BatteTarte

||

Source

Answer 1

In order to add to a Python list you should use the append() method.

Example:

import ast
ast.literal_eval(data["language"]).append("Spanish")

Answered By: slqq

Answer 2

import json
import ast

with open("example.json", "r") as jsonFile:
    data = json.load(jsonFile)

#data={"language": "['English', 'French']", "bank": 50}

#take a variable e

e=ast.literal_eval(data['language'])

e.append('Spanish')

data['language']=e

print(data)
#{'language': ['English', 'French', 'Spanish'], 'bank': 50}

Answered By: God Is One

Answer 3

{"language": "['English', 'French']", "bank": 50}

Here the "language" keys hold a string rather than a list because of the " before [ and " after ]. To solve this, change the file to this:

{"language": ["English", "French"], "bank": 50}

Then use this code to append "Spanish" or any language from now on:

import json

with open("temp.json", "r") as f:
    data = json.load(f)

data["language"].append("Spanish")

with open("temp.json", "w") as f:
    json.dump(data, f)

Answered By: mind_uncapped

How can I add an item in a list from a JSON file in Python?

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