Loop through JSON Python

Looping through JSON in Python refers to the process of iterating over the elements of a JSON array or the key-value pairs of a JSON object. It involves converting the JSON data into a Python object (such as a list or a dictionary) using the json module, and then using loops to traverse and process the JSON data.

Here’s the syntax for looping through JSON data in Python:

import json

# JSON data
json_data = '{"name": "John", "age": 30, "city": "New York"}'

# Parse the JSON string into a Python object
data = json.loads(json_data)

# Loop through each key in the JSON object
for key in data:
    # Access the value using the key
    value = data[key]
    
    # Do something with the key-value pair
    print(key, ":", value)

You can replace the print statement with any desired actions or processing logic based on your specific use case.

Loop through JSON Python example

Simple example code.

import json

# Sample JSON object
json_data = '''
{
  "name": "John",
  "age": 30,
  "city": "New York",
  "pets": ["dog", "cat"]
}
'''

# Parse the JSON string into a Python object
data = json.loads(json_data)

# Loop through each key-value pair in the JSON object
for key, value in data.items():
    # Do something with the key-value pair
    print(key, ":", value)

Output:

In this example, we start by importing the json module. Then, we define a JSON object as a string in the json_data variable.

We use json.loads() to parse the JSON string into a Python object, which is stored in the data variable. This object becomes a dictionary in this case.

We then iterate over each key-value pair in the data dictionary using a for loop. The items() method returns a list of tuples, where each tuple represents a key-value pair in the dictionary.

Inside the loop, we access the key and value of each pair using the variables key and value, respectively.

Do comment if you have any doubts or suggestions on this Python JSON topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)

Windows 10

Python 3.10.1

All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.