Contents
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
jsonString = json.dumps(list)
We have to import json package to use json.dumps().
Example 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
aList = [41, 58, 63]
jsonStr = json.dumps(aList)
print(jsonStr)
Run Output
[41, 58, 63]
Example 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
aList = [{'a':1, 'b':2}, {'c':3, 'd':4}]
jsonStr = json.dumps(aList)
print(jsonStr)
Run Output
[{"a": 1, "b": 2}, {"c": 3, "d": 4}]
Example 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
aList = [[{'a':1, 'b':2}], [{'c':3, 'd':4}]]
jsonStr = json.dumps(aList)
print(jsonStr)
Run Output
[[{"a": 1, "b": 2}], [{"c": 3, "d": 4}]]
Summary
In this tutorial of Python Examples, we learned how to convert a Python List into JSON string.