Sure! Below is an example of a simple CAPTCHA code implementation in Python using the Flask web framework:

```python

# Import necessary libraries

import random

from flask import Flask, render_template, request, jsonify

# Create a Flask app

app = Flask(__name__)

# List of characters for generating CAPTCHA code

CAPTCHA_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

# Generate a random CAPTCHA code

def generate_captcha():

captcha_code = ''.join(random.choices(CAPTCHA_CHARS, k=6))

return captcha_code

# Route to render the CAPTCHA page

@app.route('/')

def captcha_page():

captcha_code = generate_captcha()

return render_template('captcha.html', captcha_code=captcha_code)

# Route to check if the CAPTCHA code entered by the user is correct

@app.route('/check_captcha', methods=['POST'])

def check_captcha():

user_input = request.form['user_input']

actual_captcha = request.form['captcha_code']

if user_input == actual_captcha:

response = {'message': 'CAPTCHA passed!'}

else:

response = {'message': 'Incorrect CAPTCHA, please try again.'}

return jsonify(response)

# Run the Flask app

if __name__ == '__main__':

app.run(debug=True)

```

Create an HTML file named `captcha.html` in the same directory as the Python script with the following content:

```html

CAPTCHA Example

Please enter the following CAPTCHA code:

{{ captcha_code }}

```

This example sets up a simple web application using Flask to generate a random CAPTCHA code and display it to the user. The user is then prompted to enter the CAPTCHA code in a form. When the user submits the form, the server checks if the entered code matches the actual CAPTCHA code, and a corresponding message is displayed. Note that this is a basic example, and in real-world scenarios, CAPTCHAs may be more complex and involve additional security measures to prevent automated attacks.