Python json dumps to file example

Python json dumps to file example

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Python create JSON file

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Creating a JSON File using Python

JSON (JavaScript Object Notation) is a popular data interchange format used extensively in web development. Python provides various libraries to work with JSON files. We'll use the json module to create a JSON file.

Step 1: Importing the necessary modules

In your Python script, import the json and os modules:

import json
import os

Step 2: Define the data to be stored in the JSON file

Create a dictionary (or a list of dictionaries) that contains the data you want to store in the JSON file. For example:

data = {
"name": "John Doe",
"age": 30,
"address": {
"street": "123 Main St",
"city": "New York",
"state": "NY"
},
"hobbies": ["reading", "playing guitar"]
}

Step 3: Convert the data to JSON format

Use the json.dumps() function to convert the Python dictionary to a JSON string:

json_data = json.dumps(data)

Step 4: Write the JSON data to a file

Create a new file (e.g., "example.json") and write the JSON data to it:

with open('example.json', 'w') as f:
f.write(json_data)

Full Code Example

import json
import os
data = {
"name": "John Doe",
"age": 30,
"address": {
"street": "123 Main St",
"city": "New York",
"state": "NY"
},
"hobbies": ["reading", "playing guitar"]
}
json_data = json.dumps(data)
with open('example.json', 'w') as f:
f.write(json_data)

Output

When you run this script, it will create a new file named example.json containing the JSON data:

{
"name": "John Doe",
"age": 30,
"address": {
"street": "123 Main St",
"city": "New York",
"state": "NY"
},
"hobbies": [
"reading",
"playing guitar"
]
}

Tips and Variations

with open('example.json', 'w') as f:
json.dump(data, f)

That's it! This example demonstrates the basic process of creating a JSON file using Python.