Flask

from flask import Flask, render_template

app = Flask(__name__)

# Route for the home page
@app.route('/')
def home():
    return 'Hello, World!'

# Route with variable rules
@app.route('/user/<username>')
def show_user_profile(username):
    return f'User: {username}'

# Using templates
@app.route('/greeting/<name>')
def greeting(name):
    return render_template('greeting.html', name=name)

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

from flask import Flask, request, redirect, url_for

app = Flask(__name__)

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        
        # Validate credentials (simplified example)
        if username == 'admin' and password == 'secret':
            return redirect(url_for('dashboard'))
        else:
            return 'Invalid credentials!'
    
    # If GET request, show the login form
    return '''
        <form method="post">
            <label>Username: <input type="text" name="username"></label><br>
            <label>Password: <input type="password" name="password"></label><br>
            <input type="submit" value="Login">
        </form>
    '''

# blueprint_example/auth.py
from flask import Blueprint, render_template, redirect, url_for

auth = Blueprint('auth', __name__)

@auth.route('/login')
def login():
    return render_template('auth/login.html')

@auth.route('/register')
def register():
    return render_template('auth/register.html')

@auth.route('/logout')
def logout():
    # Logic to log user out
    return redirect(url_for('main.index'))

# blueprint_example/app.py
from flask import Flask
from .auth import auth

app = Flask(__name__)
app.register_blueprint(auth, url_prefix='/auth')

@app.route('/')
def index():
    return 'Welcome to the main page!'

from flask import Flask, jsonify, request

app = Flask(__name__)

# Sample data
tasks = [
    {
        'id': 1,
        'title': 'Learn Flask',
        'description': 'Find resources and complete tutorials',
        'done': False
    },
    {
        'id': 2,
        'title': 'Build an API',
        'description': 'Create a RESTful API with Flask',
        'done': False
    }
]

# Get all tasks
@app.route('/api/tasks', methods=['GET'])
def get_tasks():
    return jsonify({'tasks': tasks})

# Get a single task
@app.route('/api/tasks/<int:task_id>', methods=['GET'])
def get_task(task_id):
    task = [task for task in tasks if task['id'] == task_id]
    if len(task) == 0:
        return jsonify({'error': 'Not found'}), 404
    return jsonify({'task': task[0]})

# Create a new task
@app.route('/api/tasks', methods=['POST'])
def create_task():
    if not request.json or not 'title' in request.json:
        return jsonify({'error': 'Missing title field'}), 400
        
    task = {
        'id': tasks[-1]['id'] + 1 if tasks else 1,
        'title': request.json['title'],
        'description': request.json.get('description', ""),
        'done': False
    }
    tasks.append(task)
    return jsonify({'task': task}), 201