Python List to JSON

Python List to JSON

To convert a Python List to JSON, use json.dumps() function. dumps() function takes list as argument and returns a JSON String.

Syntax

The syntax to use json.dumps() method is

import json

json_string = json.dumps(list)

We have to import json package to use json.dumps().

Examples

In the following examples, we take a list of elements, and convert this list to a JSON string using json.dumps().

1. Convert Python list to JSON

In this example, we will take a Python list with some numbers in it and convert it to JSON string.

Python Program

import json

a_list = [41, 58, 63]
json_string = json.dumps(a_list)
print(json_string)

Output

[41, 58, 63]

2. Convert Python list of dictionaries to JSON

In this example, we will take a Python List with Dictionaries as elements and convert it to JSON string.

Python Program

import json

a_list = [{'a':1, 'b':2}, {'c':3, 'd':4}]
json_string = json.dumps(a_list)
print(json_string)

Output

[{"a": 1, "b": 2}, {"c": 3, "d": 4}]

3. Convert Python list of lists to JSON

In this example, we will take a Python List of Lists and convert it to JSON string.

Python Program

import json

a_list = [[{'a':1, 'b':2}], [{'c':3, 'd':4}]]
json_string = json.dumps(a_list)
print(json_string)

Output

[[{"a": 1, "b": 2}], [{"c": 3, "d": 4}]]

Video

In the following YouTube video, a step by step process and examples are given to show how to convert a Python list into a JSON string.

Summary

In this Python JSON Tutorial, we learned how to convert a Python List into JSON string.