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### Basic Express Server Setup

Source: https://docs.prembly.com/docs/document-verification-copy-22

This is a minimal setup for an Express.js server. It creates an Express application, defines a basic route for the root URL, and starts the server listening on a specified port. It requires the 'express' package to be installed (`npm install express`).

```javascript
const express = require('express');
const app = express();
const port = 3000;

// Middleware to parse JSON bodies
app.use(express.json());

// Define a simple route
app.get('/', (req, res) => {
  res.send('Hello World!');
});

// Start the server
app.listen(port, () => {
  console.log(`Server listening at http://localhost:${port}`);
});
```

--------------------------------

### Creating a Simple Express.js Server

Source: https://docs.prembly.com/docs/document-verification-copy-46

This Node.js snippet sets up a basic Express.js web server that listens on a specified port. It includes a simple GET route that responds with a JSON message. This is a foundational example for building web applications and APIs with Express. Make sure you have Express installed (`npm install express`).

```javascript
const express = require('express');
const app = express();
const port = 3000;

// Define a simple GET route
app.get('/', (req, res) => {
  res.json({ message: 'Hello from the Express server!' });
});

// Start the server
app.listen(port, () => {
  console.log(`Server listening at http://localhost:${port}`);
});

// To test: Run this script and then open http://localhost:3000 in your browser.
```

--------------------------------

### Basic Express.js Server Setup (Node.js)

Source: https://docs.prembly.com/docs/document-verification-copy-119

A minimal setup for an Express.js web server in Node.js. This snippet demonstrates how to create an Express application, define a simple route, and start the server. It's the foundation for building web APIs and applications. Dependencies: 'express'.

```javascript
const express = require('express');
const app = express();
const port = 3000;

app.get('/', (req, res) => {
  res.send('Hello World!');
});

app.listen(port, () => {
  console.log(`Server listening at http://localhost:${port}`);
});
```

--------------------------------

### Database Connection and Query Example in Python

Source: https://docs.prembly.com/docs/document-verification-copy-84

This Python snippet demonstrates how to establish a connection to a PostgreSQL database and execute a simple query. It uses the psycopg2 library for database interaction. Ensure you have psycopg2 installed (`pip install psycopg2-binary`) and replace placeholder connection details with your actual database credentials.

```python
import psycopg2

def get_database_connection():
    """Establishes a connection to the PostgreSQL database."""
    try:
        conn = psycopg2.connect(
            dbname='your_db_name',
            user='your_db_user',
            password='your_db_password',
            host='your_db_host',
            port='your_db_port'
        )
        return conn
    except Exception as e:
        print(f"Error connecting to database: {e}")
        return None

def fetch_data():
    """Fetches data from a sample table."""
    conn = get_database_connection()
    if conn is None:
        return

    cursor = conn.cursor()
    try:
        cursor.execute("SELECT id, name FROM sample_table LIMIT 5;")
        rows = cursor.fetchall()
        for row in rows:
            print(f"ID: {row[0]}, Name: {row[1]}")
    except Exception as e:
        print(f"Error executing query: {e}")
    finally:
        cursor.close()
        conn.close()

if __name__ == "__main__":
    fetch_data()
```

--------------------------------

### Basic Express.js Server Setup

Source: https://docs.prembly.com/docs/document-verification-copy-96

Sets up a minimal Express.js server that listens on a specified port. Includes basic middleware for JSON parsing and CORS handling. Assumes Express and CORS packages are installed.

```javascript
const express = require('express');
const cors = require('cors');

const app = express();
const port = process.env.PORT || 3000;

// Middleware
app.use(cors());
app.use(express.json());

// Basic route
app.get('/', (req, res) => {
  res.send('Hello World!');
});

// Start server
app.listen(port, () => {
  console.log(`Server listening on port ${port}`);
});

module.exports = app;
```

--------------------------------

### Node.js: Basic Express Server Setup

Source: https://docs.prembly.com/docs/document-verification-copy-25

Sets up a basic Express.js server with a single GET route. This snippet demonstrates how to initialize an Express application and define a simple API endpoint. It listens on port 3000. Dependencies include the `express` package.

```javascript
const express = require('express');
const app = express();
const port = 3000;

app.get('/', (req, res) => {
  res.send('Hello World!');
});

app.listen(port, () => {
  console.log(`App listening at http://localhost:${port}`);
});
```

--------------------------------

### SQL: Creating a Table and Inserting Data

Source: https://docs.prembly.com/docs/document-verification-copy-56

A standard SQL example showing the creation of a 'users' table with basic columns and then inserting sample data into it. This is a common pattern for database initialization.

```sql
CREATE TABLE users (
    id INT PRIMARY KEY AUTO_INCREMENT,
    username VARCHAR(50) NOT NULL,
    email VARCHAR(100) UNIQUE NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

INSERT INTO users (username, email)
VALUES ('john_doe', 'john.doe@example.com'),
       ('jane_smith', 'jane.smith@example.com');
```

--------------------------------

### Send API Request (Example)

Source: https://docs.prembly.com/docs/document-verification-copy-22

This JavaScript snippet shows a basic example of sending an HTTP GET request to an external API using the 'axios' library. It demonstrates handling the response and potential errors. Ensure 'axios' is installed (`npm install axios`).

```javascript
const axios = require('axios');

async function fetchDataFromAPI(url) {
  try {
    const response = await axios.get(url);
    return response.data;
  } catch (error) {
    console.error('Error fetching data:', error.message);
    throw error; // Re-throw to allow caller to handle
  }
}

// Example usage:
// fetchDataFromAPI('https://api.example.com/data')
//  .then(data => console.log(data))
//  .catch(err => console.error('Failed to get data'));
```

--------------------------------

### Express.js Route for Getting All Items

Source: https://docs.prembly.com/docs/document-verification-copy-96

Defines an Express.js route to handle GET requests for all items. This example assumes an 'items' array is available in memory for demonstration. In a real application, this would typically fetch data from a database. Assumes Express is installed.

```javascript
const express = require('express');
const router = express.Router();

// Dummy data for demonstration
let items = [
  { id: 1, name: 'Item 1', description: 'Description for Item 1' },
  { id: 2, name: 'Item 2', description: 'Description for Item 2' }
];

// GET all items
router.get('/', (req, res) => {
  res.json(items);
});

module.exports = router;
```

--------------------------------

### Logging Setup (Python)

Source: https://docs.prembly.com/docs/document-verification-copy-118

This Python snippet shows how to set up basic logging for an application. It configures the logging level and format, allowing for better tracking of application events and errors. This is essential for debugging and monitoring.

```python
import logging

def setup_logging(level=logging.INFO):
    logging.basicConfig(
        level=level,
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )

setup_logging()

logging.info('Application started successfully.')
logging.warning('This is a warning message.')
logging.error('An error occurred.')
```

--------------------------------

### Initialize and Query Database (Python)

Source: https://docs.prembly.com/docs/document-verification-copy-89

This Python snippet shows how to initialize a database connection and perform basic query operations. It utilizes a hypothetical database library to demonstrate connection setup and SQL execution.

```python
from prembly.database import DatabaseConnection

DB_HOST = "localhost"
DB_PORT = 5432
DB_NAME = "prembly"
DB_USER = "admin"
DB_PASSWORD = "password"

def initialize_db_connection() -> DatabaseConnection:
    """Initializes and returns a database connection."""
    db_conn = DatabaseConnection(host=DB_HOST, port=DB_PORT, dbname=DB_NAME, user=DB_USER, password=DB_PASSWORD)
    db_conn.connect()
    return db_conn

def get_users_from_db(db_conn: DatabaseConnection) -> list:
    """Fetches all users from the database."""
    query = "SELECT * FROM users;"
    results = db_conn.execute_query(query)
    return results

def get_user_by_id(db_conn: DatabaseConnection, user_id: int) -> dict:
    """Fetches a single user by their ID."""
    query = f"SELECT * FROM users WHERE id = {user_id};"
    results = db_conn.execute_query(query)
    return results[0] if results else None

```

--------------------------------

### Fetch Data from an API using Axios in JavaScript

Source: https://docs.prembly.com/docs/drivers-license-image-copy

This example demonstrates how to make an HTTP GET request to fetch data from a remote API using the Axios library in JavaScript. It handles both successful responses and potential errors. Ensure Axios is installed (`npm install axios` or included via CDN).

```javascript
const axios = require('axios');

const apiUrl = 'https://jsonplaceholder.typicode.com/posts/1';

async function fetchData() {
  try {
    const response = await axios.get(apiUrl);
    console.log('Data:', response.data);
    return response.data;
  } catch (error) {
    console.error('Error fetching data:', error.message);
    throw error;
  }
}

fetchData();
```

--------------------------------

### Python: Define a simple Flask API endpoint

Source: https://docs.prembly.com/docs/document-verification-copy-134

Defines a basic API endpoint using the Flask microframework in Python. This example shows how to create a route that accepts GET requests and returns a JSON response. It requires Flask to be installed (`pip install Flask`).

```python
from flask import Flask, jsonify

app = Flask(__name__)

@app.route('/api/data', methods=['GET'])
def get_data():
    data = {
        "message": "Hello from the Flask API!",
        "status": "success"
    }
    return jsonify(data)

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

--------------------------------

### Go: Basic HTTP Server for API Endpoints

Source: https://docs.prembly.com/docs/document-verification-copy-114

This Go snippet demonstrates setting up a basic HTTP server to handle API requests. It uses the standard `net/http` package to define routes and their handlers. This example includes a handler for fetching a user's profile.

```go
package main

import (
	"encoding/json"
	"fmt"
	"log"
	"net/http"
)

type UserProfile struct {
	UserID   string `json:"user_id"`
	Username string `json:"username"`
	Email    string `json:"email"`
}

func getUserProfileHandler(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	// In a real app, you would fetch this from a database
	user := UserProfile{
		UserID:   "user-123",
		Username: "prembly_user",
		Email:    "user@prembly.com",
	}

	w.Header().Set("Content-Type", "application/json")
	err := json.NewEncoder(w).Encode(user)
	if err != nil {
		log.Printf("Error encoding JSON: %v", err)
		http.Error(w, "Internal server error", http.StatusInternalServerError)
	}
}

func main() {
	http.HandleFunc("/api/v1/users/profile", getUserProfileHandler)

	port := "8080"
	fmt.Printf("Server starting on port %s\n", port)

	log.Fatal(http.ListenAndServe(":"+port, nil))
}
```

--------------------------------

### Initialize and Configure Application Settings (Python)

Source: https://docs.prembly.com/docs/document-verification-copy-160

This Python code shows how to initialize application settings, potentially from environment variables or a configuration file. It sets up logging and defines constants used throughout the application. It requires the 'os' and 'logging' modules.

```python
import os
import logging

# Configure logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')

# Load configuration from environment variables
API_KEY = os.environ.get('API_KEY')
DATABASE_URL = os.environ.get('DATABASE_URL')

if not API_KEY or not DATABASE_URL:
    logging.error("API_KEY or DATABASE_URL not set")
    # Handle error appropriately, e.g., exit or raise exception

APP_NAME = "Prembly App"
VERSION = "1.0.0"

def get_app_info():
    return f"{APP_NAME} - Version {VERSION}"
```

--------------------------------

### Define a Simple Express.js Route (JavaScript)

Source: https://docs.prembly.com/docs/document-verification-copy-22

A basic example of setting up a GET route in an Express.js application. This route responds with a JSON object when accessed. It assumes Express.js is installed and configured.

```javascript
const express = require('express');
const app = express();
const port = 3000;

app.get('/api/data', (req, res) => {
  res.json({ message: 'Hello from the API!' });
});

app.listen(port, () => {
  console.log(`Server listening at http://localhost:${port}`);
});
```

--------------------------------

### Configuration File Example (INI)

Source: https://docs.prembly.com/docs/document-verification-copy-44

An example of an INI configuration file. It shows how to define sections and key-value pairs for application settings.

```ini
[Section1]
Key1 = Value1
Key2 = Value2

[Section2]
AnotherKey = AnotherValue
```

--------------------------------

### JavaScript: Perform GET Request with Axios

Source: https://docs.prembly.com/docs/document-verification-copy-131

This JavaScript snippet demonstrates how to make a GET request to a specified URL using the Axios library. It handles the response and logs the data. It requires Axios to be installed (`npm install axios` or included via CDN).

```javascript
const axios = require('axios');

async function fetchData(url) {
    try {
        const response = await axios.get(url);
        console.log(response.data);
    } catch (error) {
        console.error('Error fetching data:', error);
    }
}
```

--------------------------------

### Make HTTP GET Request in Python

Source: https://docs.prembly.com/docs/age-and-gender

This Python snippet shows how to make an HTTP GET request to a specified URL using the 'requests' library. It fetches data from the URL and prints the response text. Ensure the 'requests' library is installed (`pip install requests`).

```python
import requests

url = 'https://jsonplaceholder.typicode.com/posts/1'

try:
    response = requests.get(url)
    response.raise_for_status()  # Raise an exception for bad status codes
    data = response.json()
    print(data)
except requests.exceptions.RequestException as e:
    print(f'Error making request: {e}')
```

--------------------------------

### SQL: Create and query a table

Source: https://docs.prembly.com/docs/document-verification-copy-88

This SQL snippet demonstrates the creation of a 'users' table with columns for user ID, name, email, and signup date. It then inserts sample data and performs a query to retrieve users who signed up after a specific date. This is useful for database setup and data retrieval operations.

```sql
CREATE TABLE users (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(255) NOT NULL,
    email VARCHAR(255) UNIQUE NOT NULL,
    signup_date DATE
);

INSERT INTO users (name, email, signup_date) VALUES 
('John Doe', 'john.doe@example.com', '2023-01-15'),
('Jane Smith', 'jane.smith@example.com', '2023-03-10'),
('Peter Jones', 'peter.jones@example.com', '2023-02-20');

SELECT * FROM users WHERE signup_date > '2023-02-01';
```

--------------------------------

### Get Wallet Balance Request (Example)

Source: https://docs.prembly.com/docs/get-wallet-balance

This snippet demonstrates how to make a GET request to the Prembly wallet balance endpoint. It includes the necessary headers and the expected response structure. Note that this endpoint is only available in the live environment.

```HTTP
GET {{URL}}/prembly/wallet/balance

Header:
x-api-key: Your Secret Key
app-id: Your app-id
```

--------------------------------

### Basic Configuration Setup

Source: https://docs.prembly.com/docs/document-verification-copy-126

This snippet demonstrates a basic configuration object, often used to store application settings. It includes common configuration properties.

```javascript
const appConfig = {
  apiUrl: '/api/v1',
  timeout: 5000,
  enableLogging: true,
  featureFlags: {
    newDashboard: false,
    betaFeature: true
  }
};
```

--------------------------------

### API Request and Response Handling (Python)

Source: https://docs.prembly.com/docs/drivers-license-v2

This Python snippet shows how to make an HTTP GET request to an API endpoint and handle the response. It uses the 'requests' library, which needs to be installed (`pip install requests`).

```python
import requests

def fetch_api_data(api_url):
    """Fetches data from a given API URL."""
    try:
        response = requests.get(api_url)
        response.raise_for_status()  # Raise an exception for bad status codes
        return response.json()
    except requests.exceptions.RequestException as e:
        return {"error": str(e)}

# Example usage:
api_endpoint = "https://api.example.com/data"
api_data = fetch_api_data(api_endpoint)
print(api_data)
```

--------------------------------

### Implement a basic HTTP GET request in Python using requests

Source: https://docs.prembly.com/docs/document-verification-copy-17

This Python code snippet demonstrates how to perform an HTTP GET request to a specified URL using the `requests` library. It fetches data from the URL and prints the status code and the JSON response. This is a fundamental operation for interacting with web APIs. Ensure you have the `requests` library installed (`pip install requests`).

```python
import requests

url = 'https://api.example.com/data'

try:
    response = requests.get(url)
    response.raise_for_status()  # Raise an exception for bad status codes (4xx or 5xx)
    data = response.json()
    print(f"Status Code: {response.status_code}")
    print("Response Data:")
    print(data)
except requests.exceptions.RequestException as e:
    print(f"Error making request: {e}")
```

--------------------------------

### Initialize Database and Create Tables (SQL)

Source: https://docs.prembly.com/docs/document-verification-copy-161

This SQL code initializes a database and creates necessary tables. It sets up tables for users, products, orders, and other relevant entities. This is typically a foundational step for any application that requires data persistence.

```sql
DROP TABLE IF EXISTS "users";
DROP TABLE IF EXISTS "products";
DROP TABLE IF EXISTS "orders";
DROP TABLE IF EXISTS "order_items";

CREATE TABLE "users" (
    "user_id" INTEGER PRIMARY KEY AUTOINCREMENT,
    "username" TEXT NOT NULL UNIQUE,
    "email" TEXT NOT NULL UNIQUE,
    "password_hash" TEXT NOT NULL,
    "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE "products" (
    "product_id" INTEGER PRIMARY KEY AUTOINCREMENT,
    "name" TEXT NOT NULL,
    "description" TEXT,
    "price" REAL NOT NULL,
    "stock" INTEGER NOT NULL DEFAULT 0,
    "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE "orders" (
    "order_id" INTEGER PRIMARY KEY AUTOINCREMENT,
    "user_id" INTEGER NOT NULL,
    "order_date" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    "status" TEXT NOT NULL DEFAULT 'pending',
    "total_amount" REAL NOT NULL,
    FOREIGN KEY ("user_id") REFERENCES "users"("user_id")
);

CREATE TABLE "order_items" (
    "order_item_id" INTEGER PRIMARY KEY AUTOINCREMENT,
    "order_id" INTEGER NOT NULL,
    "product_id" INTEGER NOT NULL,
    "quantity" INTEGER NOT NULL,
    "price_at_order" REAL NOT NULL,
    FOREIGN KEY ("order_id") REFERENCES "orders"("order_id"),
    FOREIGN KEY ("product_id") REFERENCES "products"("product_id")
);
```

--------------------------------

### Fetching Data with Axios

Source: https://docs.prembly.com/docs/drivers-license-image-copy

This JavaScript code uses the Axios library to make an HTTP GET request to a specified URL. It handles the promise resolution and logs the response data. Ensure Axios is installed (`npm install axios`).

```javascript
axios.get('/api/data')
  .then(response => {
    console.log(response.data);
  })
  .catch(error => {
    console.error('Error fetching data:', error);
  });
```

--------------------------------

### Create a Simple HTTP Server in Go

Source: https://docs.prembly.com/docs/document-verification-copy-158

This Go snippet demonstrates how to create a basic HTTP server that listens on a specified port and handles incoming requests. It includes a handler function for the root path ('/'). No external dependencies are required beyond the standard Go library.

```go
package main

import (
	"fmt"
	"log"
	"net/http"
)

func main() {
	// Define a handler function for the root path
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Hello, World! You requested: %s\n", r.URL.Path)
	})

	// Set the port the server will listen on
	port := ":8080"

	// Start the HTTP server
	fmt.Printf("Server listening on port %s\n", port)
	log.Fatal(http.ListenAndServe(port, nil))
}

```

--------------------------------

### Node.js Web Server Setup

Source: https://docs.prembly.com/docs/document-verification-copy-11

This code sets up a basic HTTP server using Node.js and the Express framework. It listens for incoming requests and sends a response. It's foundational for building web applications. Requires 'express' and 'http' modules.

```javascript
const express = require('express');
const http = require('http');

const app = express();
const server = http.createServer(app);
const port = 3000;

app.get('/', (req, res) => {
  res.send('Hello from Prembly!');
});

server.listen(port, () => {
  console.log(`Server running at http://localhost:${port}/`);
});
```

--------------------------------

### Handle File Uploads with Multer in Node.js

Source: https://docs.prembly.com/docs/drivers-license-image-copy

This example shows how to configure Multer, a middleware for Express.js, to handle file uploads. It sets up a destination folder for uploaded files and specifies a filename strategy. Ensure Multer is installed (`npm install multer`).

```javascript
const express = require('express');
const multer = require('multer');
const path = require('path');

const app = express();
const port = 3000;

// Configure Multer for file storage
const storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, 'uploads/'); // 'uploads/' is the directory where files will be saved
  },
  filename: function (req, file, cb) {
    cb(null, Date.now() + path.extname(file.originalname)); // Appending timestamp to filename
  }
});

const upload = multer({ storage: storage });

// Route to handle file upload
app.post('/upload', upload.single('myFile'), (req, res) => {
  // req.file contains information about the uploaded file
  if (!req.file) {
    return res.status(400).send('No file uploaded.');
  }
  res.send('File uploaded successfully!');
});

app.listen(port, () => {
  console.log(`Server listening at http://localhost:${port}`);
});
```

--------------------------------

### Express.js Route for Getting a Specific Item

Source: https://docs.prembly.com/docs/document-verification-copy-96

Defines an Express.js route to handle GET requests for a single item by its ID. It searches the in-memory 'items' array for a matching ID. Returns the item if found, otherwise a 404 error. Assumes Express is installed.

```javascript
const express = require('express');
const router = express.Router();

// Dummy data
let items = [
  { id: 1, name: 'Item 1', description: 'Description for Item 1' },
  { id: 2, name: 'Item 2', description: 'Description for Item 2' }
];

// GET a specific item by ID
router.get('/:id', (req, res) => {
  const id = parseInt(req.params.id);
  const item = items.find(i => i.id === id);
  if (item) {
    res.json(item);
  } else {
    res.status(404).send('Item not found');
  }
});

module.exports = router;
```

--------------------------------

### Create a Simple Web Server in Python

Source: https://docs.prembly.com/docs/document-verification-copy-80

This Python code snippet sets up a basic HTTP server using the built-in `http.server` module. It can serve files from the current directory. This is useful for local development and testing of static web content. It requires Python 3 and can be run from the command line.

```Python
import http.server
import socketserver

PORT = 8000

Handler = http.server.SimpleHTTPRequestHandler

with socketserver.TCPServer(("", PORT), Handler) as httpd:
    print(f"Serving at port {PORT}")
    print(f"Open your browser to http://localhost:{PORT}/")
    httpd.serve_forever()
```

--------------------------------

### API Request in Python (using requests)

Source: https://docs.prembly.com/docs/document-verification-copy-33

This Python snippet demonstrates making a GET request to a sample API endpoint using the 'requests' library. It prints the status code and the JSON response. Ensure the 'requests' library is installed (`pip install requests`).

```python
import requests

url = 'https://api.example.com/data'
try:
    response = requests.get(url)
    response.raise_for_status()  # Raise an exception for bad status codes
    data = response.json()
    print('API Response:', data)
except requests.exceptions.RequestException as e:
    print(f'Error making API request: {e}')
```

--------------------------------

### Run Project with npm

Source: https://docs.prembly.com/docs/drivers-license-image-copy

This command executes the project's start script defined in the package.json file. It's typically used to launch a development server or the main application.

```bash
npm start
```

--------------------------------

### Create and Start a Docker Container in Python

Source: https://docs.prembly.com/docs/document-verification-copy-140

Uses the 'docker' SDK for Python to create and start a Docker container from a specified image. This is useful for programmatically managing Docker resources. Ensure the Docker daemon is running.

```python
import docker

def start_docker_container(image_name, container_name):
    """Creates and starts a Docker container."""
    client = docker.from_env()
    try:
        container = client.containers.run(image_name, name=container_name, detach=True)
        print(f"Container {container_name} started successfully.")
        return container
    except docker.errors.APIError as e:
        print(f"Error starting container: {e}")
        return None
```

--------------------------------

### Python Script for Application Setup

Source: https://docs.prembly.com/docs/document-verification-copy-20

This Python script sets up and runs a web application. It imports necessary modules like `Flask` and `TagManager`. The script defines routes for handling tag-related operations (GET, POST, PUT, DELETE) and interacts with the `TagManager` to perform database actions.

```python
from flask import Flask, request, jsonify
from manager import TagManager
from migration import Migrator
from slugify import slugify

app = Flask(__name__)

conn = (
    'postgresql://user:password@host:port/database'
)

# Migration
# migrator = Migrator(conn, './migrations')
# migrator.apply()

tag_manager = TagManager(conn)

@app.route('/tag', methods=['GET'])
def get_tags():
    tags = tag_manager.select()
    return jsonify(tags)

@app.route('/tag', methods=['POST'])
def create_tag():
    data = request.get_json()
    name = data.get('name')
    slug = slugify(name)
    description = data.get('description')
    author = data.get('author')
    tag_manager.insert(name, slug, description, author)
    return jsonify({'message': 'Tag created successfully'}), 201

@app.route('/tag/<int:id>', methods=['PUT'])
def update_tag(id):
    data = request.get_json()
    name = data.get('name')
    slug = slugify(name)
    description = data.get('description')
    author = data.get('author')
    tag_manager.update(id, name, slug, description, author)
    return jsonify({'message': 'Tag updated successfully'})

@app.route('/tag/<int:id>', methods=['DELETE'])
def delete_tag(id):
    tag_manager.delete(id)
    return jsonify({'message': 'Tag deleted successfully'})

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

--------------------------------

### Fetch Data from REST API using Axios in Vue.js

Source: https://docs.prembly.com/docs/document-verification-copy-158

This Vue.js snippet demonstrates fetching data from a REST API using the 'axios' library. It shows how to make a GET request and handle the response within a component's lifecycle method. Axios needs to be installed (`npm install axios`).

```javascript
import axios from 'axios';

export default {
  data() {
    return {
      items: [],
      error: null
    };
  },
  mounted() {
    this.fetchItems();
  },
  methods: {
    async fetchItems() {
      try {
        const response = await axios.get('https://api.example.com/items');
        this.items = response.data;
      } catch (error) {
        this.error = 'Failed to fetch items.';
        console.error('Error fetching items:', error);
      }
    }
  }
};

```

--------------------------------

### Python: API Client for User Management

Source: https://docs.prembly.com/docs/document-verification-copy-149

This Python snippet provides a basic client for interacting with a user management API. It uses the `requests` library to perform GET and POST operations for fetching and creating users. Ensure the 'requests' library is installed (`pip install requests`).

```python
import requests
import json

class UserApiClient:
    def __init__(self, base_url, api_key):
        self.base_url = base_url
        self.api_key = api_key
        self.headers = {
            "Authorization": f"Bearer {self.api_key}",
            "Content-Type": "application/json"
        }

    def get_user(self, user_id):
        """Fetches a user by their ID."""
        url = f"{self.base_url}/users/{user_id}"
        try:
            response = requests.get(url, headers=self.headers)
            response.raise_for_status()  # Raise an exception for bad status codes (4xx or 5xx)
            return response.json()
        except requests.exceptions.RequestException as e:
            print(f"Error fetching user {user_id}: {e}")
            return None

    def create_user(self, user_data):
        """Creates a new user."""
        url = f"{self.base_url}/users"
        try:
            response = requests.post(url, headers=self.headers, data=json.dumps(user_data))
            response.raise_for_status()
            return response.json()
        except requests.exceptions.RequestException as e:
            print(f"Error creating user: {e}")
            return None

# Example Usage:
# api_client = UserApiClient("https://api.prembly.com", "YOUR_API_KEY")
# user = api_client.get_user(123)
# if user:
#     print(f"Fetched user: {user}")
# 
# new_user_data = {
#     "username": "newuser",
#     "email": "newuser@example.com"
# }
# created_user = api_client.create_user(new_user_data)
# if created_user:
#     print(f"Created user: {created_user}")
```

--------------------------------

### Database Connection and Querying in Python (SQLAlchemy)

Source: https://docs.prembly.com/docs/document-verification-copy-105

This snippet shows how to establish a database connection using SQLAlchemy and execute a simple SELECT query. It demonstrates creating an engine, defining a metadata object, and executing raw SQL. This is useful for interacting with relational databases like PostgreSQL or MySQL. Ensure you have the appropriate database driver installed (e.g., `psycopg2` for PostgreSQL).

```python
from sqlalchemy import create_engine, MetaData, text

# Database connection URL (replace with your actual credentials)
DATABASE_URL = "postgresql://user:password@host:port/database"

# Create a database engine
try:
    engine = create_engine(DATABASE_URL)
    metadata = MetaData()

    # Test the connection
    with engine.connect() as connection:
        result = connection.execute(text("SELECT 1"))
        print("Database connection successful!")

    # Example query: Select all users from a 'users' table
    with engine.connect() as connection:
        query = text("SELECT id, username, email FROM users LIMIT 5")
        results = connection.execute(query)

        for row in results:
            print(f"ID: {row.id}, Username: {row.username}, Email: {row.email}")

except Exception as e:
    print(f"Error connecting to database or executing query: {e}")

```

--------------------------------

### SQL: Creating and Populating a 'products' Table

Source: https://docs.prembly.com/docs/document-verification-copy-12

Defines a SQL table named 'products' with columns for product ID, name, price, and creation timestamp. It then inserts sample data into this table. This script is compatible with PostgreSQL and similar SQL databases.

```sql
-- Create the 'products' table if it doesn't exist
CREATE TABLE IF NOT EXISTS products (
    product_id SERIAL PRIMARY KEY,
    product_name VARCHAR(255) NOT NULL,
    price DECIMAL(10, 2) NOT NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Insert sample data into the 'products' table
INSERT INTO products (product_name, price)
VALUES
('Laptop', 1200.00),
('Keyboard', 75.50),
('Mouse', 25.99),
('Monitor', 300.00);

-- Verify the inserted data (optional)
SELECT * FROM products;
```

--------------------------------

### Python: API Request and Response Handling

Source: https://docs.prembly.com/docs/document-verification-copy-111

This Python snippet demonstrates making a GET request to a REST API and handling the JSON response. It uses the `requests` library, which needs to be installed (`pip install requests`). The snippet includes basic error handling for network issues and non-200 status codes.

```python
import requests
import json

def fetch_api_data(api_url):
    """Fetches data from a given API URL.

    Args:
        api_url (str): The URL of the API endpoint.

    Returns:
        dict: The JSON response data, or None if an error occurred.
    """
    try:
        response = requests.get(api_url)
        response.raise_for_status()  # Raise an exception for bad status codes (4xx or 5xx)
        return response.json()
    except requests.exceptions.RequestException as e:
        print(f"Error fetching data: {e}")
        return None

# Example usage:
api_endpoint = "https://jsonplaceholder.typicode.com/posts/1"
data = fetch_api_data(api_endpoint)

if data:
    print(json.dumps(data, indent=2))
```
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