Python To Generate Dynamic Nested Json String

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write, and easy for machines to parse and generate. In Python, working with dynamic nested JSON strings is a common task, especially when dealing with complex data structures. In this article, we’ll explore some generally used methods to generate dynamic nested JSON strings in Python.

Python To Generate Dynamic Nested Json String

Below, are the methods of Python To Generate Dynamic Nested JSON String in Python.

• Using Python Dictionaries
• Using Python Objects
• Using Recursive Functions

Generate Dynamic Nested Json String Using Python Dictionaries

In this example, The code defines a Python dictionary `data_dict` representing nested data with attributes like name, age, address, and contacts. It then uses the `json. dumps()` function to convert the dictionary into a formatted JSON string (`json_string_dict`) with an indentation of 2 spaces.

Python3

import json

# Using Python Dictionaries
data_dict = {
    "name": "John",
    "age": 25,
    "address": {"city": "Cityville", "zip": "12345"},
    "contacts": [{"type": "email", "value": "john@example.com"}]
}

json_string_dict = json.dumps(data_dict, indent=2)
print("Output")
print(json_string_dict)

Output

Output
{
  "name": "John",
  "age": 25,
  "address": {
    "city": "Cityville",
    "zip": "12345"
  },
  "contacts": [
    {
      "type": "email",
      "value": "john@example.com"
    }
  ]
}

Generate Dynamic Nested Json String Using Python Objects

In this example, This code defines a Python class `Person` with attributes like name, age, address, and contacts. An instance `person_obj` is created with specific values. The `serialize` function is used to customize serialization, converting the object to a dictionary. The `json.dumps()` function then converts the custom object into a JSON-formatted string (`json_string_obj`) with an indentation of 2 spaces.

Python3

import json

# Using Python Objects
class Person:
    def __init__(self, name, age, address, contacts):
        self.name = name
        self.age = age
        self.address = address
        self.contacts = contacts

person_obj = Person("Jane", 30, {"city": "Townsville", "zip": "54321"}, [{"type": "email", "value": "jane@example.com"}])

def serialize(obj):
    if isinstance(obj, Person):
        return obj.__dict__
    return obj

json_string_obj = json.dumps(person_obj, default=serialize, indent=2)
print("\nOutput")
print(json_string_obj)

Output

Output
{
  "name": "Jane",
  "age": 30,
  "address": {
    "city": "Townsville",
    "zip": "54321"
  },
  "contacts": [
    {
      "type": "email",
      "value": "jane@example.com"
    }
  ]
}

Generate Dynamic Nested Json String Using Recursive Functions

In this example, This code utilizes a recursive function `convert_to_json` to handle nested structures. It recursively traverses the input data (`data_recursive`), converting dictionaries and lists into nested structures. The resulting JSON-formatted string (`json_string_recursive`) is generated with an indentation of 2 spaces .

Python3

import json

# Using Recursive Functions
def convert_to_json(obj):
    if isinstance(obj, dict):
        return {key: convert_to_json(value) for key, value in obj.items()}
    elif isinstance(obj, list):
        return [convert_to_json(item) for item in obj]
    else:
        return obj

data_recursive = {
    "name": "Alice",
    "age": 28,
    "address": {"city": "Villagetown", "zip": "67890"},
    "contacts": [{"type": "email", "value": "alice@example.com"}]
}

json_string_recursive = json.dumps(convert_to_json(data_recursive), indent=2)
print("\nMethod 3:")
print(json_string_recursive)

Output

Method 3:
{
  "name": "Alice",
  "age": 28,
  "address": {
    "city": "Villagetown",
    "zip": "67890"
  },
  "contacts": [
    {
      "type": "email",
      "value": "alice@example.com"
    }
  ]...

Conclusion

In conclusion, Python provides versatile methods for generating dynamic nested JSON strings, catering to different preferences and requirements. Whether utilizing dictionaries, custom objects, or recursive functions, developers can choose the approach that best fits their specific use case. The simplicity of dictionaries makes them suitable for straightforward structures, while custom objects and recursive functions offer flexibility for handling more complex nested data.