Introduction to UUID

The UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are vital in distributed systems and databases to ensure entities are distinct.

Key UUID API Examples

Generating UUID in Python

  import uuid
  # Generate a random UUID
  new_uuid = uuid.uuid4()
  print(new_uuid)

Generating UUID in JavaScript

  // Using the UUID library
  const { v4: uuidv4 } = require('uuid');
  const newUuid = uuidv4();
  console.log(newUuid);

Generating UUID in Java

  import java.util.UUID;
  // Generate a random UUID
  UUID newUuid = UUID.randomUUID();
  System.out.println(newUuid.toString());

Generating UUID in PHP

  // Using the Ramsey UUID library
  require 'vendor/autoload.php';
  use Ramsey\Uuid\Uuid;
  $newUuid = Uuid::uuid4();
  echo $newUuid->toString();

Generating UUID in C#

  using System;
  // Generate a random UUID
  Guid newUuid = Guid.NewGuid();
  Console.WriteLine(newUuid.ToString());

UUID in JSON

  {
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "name": "Sample Item"
  }

Practical App Example Using UUID

Let’s create a simple user registration app that assigns a unique identifier to each user using the Python Flask framework.

  from flask import Flask, request, jsonify
  import uuid

  app = Flask(__name__)

  users = {}

  @app.route('/register', methods=['POST'])
  def register():
      data = request.json
      user_id = uuid.uuid4()
      users[str(user_id)] = {
          'name': data['name'],
          'email': data['email']
      }
      return jsonify({'user_id': str(user_id)}), 201

  if __name__ == '__main__':
      app.run(debug=True)

When you post user details to the /register endpoint, it will generate a new UUID for the user and store their information.

Hash: 75666699b77db631f576041e8102a55b46758c01b807eacae0f170930ab59b3d