Check If Python Json Object is Empty

Python users frequently work with JSON, particularly when exchanging data between multiple devices. In this article, we'll learn how to check if a JSON object is empty using Python.

Check If a JSON Object Is Empty in Python

Below, we provide examples to illustrate how to check if a JSON object is empty or not using Python.

• Using len() function
• Using not operator
• Using Empty Dictionary Comparision

Check If a JSON Object Is Empty Using len() Method

In this example, below code defines a function `is_json_empty` that takes a JSON object as input and returns `True` if its length is 0, indicating an empty JSON object. It then creates an empty JSON object, `json_obj`, and prints the result of calling the function.

import json

def is_json_empty(json_obj):
    # return true if length is 0.
    return len(json_obj) == 0

json_obj = {}  # Empty JSON object
print(is_json_empty(json_obj))  

True

Check If a JSON Object Is Empty Using not Operator

In this example, below code checks if two JSON objects, `Geeks` (empty) and `GeeksTutorial` (with data), are empty and prints the corresponding messages. In this instance, it prints "JSON object 1 is empty." for `Geeks` and "JSON object 2 is not empty." along with the contents of `GeeksTutorial`.

# JSON object 1
Geeks = {}

# JSON object 2
GeeksTutorial = {
    "title": "Introduction to Python",
    "author": "GeeksforGeeks",
    "topics": ["Basics", "Data Structures", "Functions", "Modules"],
}

# Check if the JSON object is empty
if not Geeks:
    print("JSON object 1 is empty.")
else:
    print("JSON object 1 is not empty.")
 
# Check if the JSON object is empty
if not GeeksTutorial:
    print("JSON object 2 is empty.")
else:
    print("JSON object 2 is not empty.")
    print(GeeksTutorial)

JSON object 1 is empty.
JSON object 2 is not empty.
{'title': 'Introduction to Python', 'author': 'GeeksforGeeks', 'topics': ['Basics', 'Data Structures', 'Functions', 'Modules']}

Check If a JSON Object Is Empty Using Comparision

In this example, code defines a function `is_json_empty` that checks if a JSON object is empty by comparing it to an empty dictionary (`{}`). It then creates an empty JSON object, `json_obj`, and prints the result of calling the function with this object, confirming that the output is `True`.

import json

def is_json_empty(json_obj):
    return json_obj == {}

json_obj = {}  # Empty JSON object
print(is_json_empty(json_obj))  

True

Conclusion

In this article, we explored three different methods to check if a JSON object is empty in Python. Whether you prefer using the len() function, the not operator, or directly comparing the JSON object with an empty dictionary, you have multiple options to accomplish this task efficiently.