A Python Flask web application specifically updated for compatibility with Python 3.6.8 and Flask 2.0.3, implementing a password change interface for SME Server systems.

Compatibility

✅ Python 3.6.8 - Fully tested and compatible
✅ Flask 2.0.3 - Compatible version
✅ Werkzeug 2.0.3 - Compatible version
✅ Flask-CORS 3.0.10 - Compatible version

Key Changes for Python 3.6.8

Removed f-string formatting (replaced with .format())
Updated type hints for Python 3.6 compatibility
Compatible Flask and dependency versions
Tested string formatting methods

Requirements

Flask==2.0.3
Flask-CORS==3.0.10
Werkzeug==2.0.3

Features

Web interface matching the original SME Server design
Integration with SME Server configuration database
Password strength validation
Current password verification
Uses signal-event password-update for proper password updates
Responsive design for mobile and desktop
Error handling and security measures
Demo mode for testing

Quick Installation

Extract the application files to your SME Server
Run the installation script:
```
sudo ./install.sh
```
Access the application at http://your-server:5000

Manual Installation

If you prefer manual installation:

Install dependencies:

pip3 install Flask==2.0.3 Flask-CORS==3.0.10 Werkzeug==2.0.3

Copy files to /opt/smeserver-password-app/
Create and start the systemd service (see install.sh for details)

Testing

Use the demo mode for testing:

python3 demo_mode.py

Demo users:

Username: testuser, Password: oldpassword123
Username: admin, Password: adminpass456
Username: john, Password: johnpass789

File Structure

smeserver-password-app-py36/
├── app.py                    # Main Flask application (Python 3.6.8 compatible)
├── smeserver_utils.py        # SME Server utilities (Python 3.6.8 compatible)
├── demo_mode.py             # Demo version (Python 3.6.8 compatible)
├── requirements.txt         # Python 3.6.8 compatible dependencies
├── install.sh              # Installation script with version checks
├── templates/
│   └── password_change.html # Web interface template
├── static/
│   └── css/
│       └── style.css       # Styling
└── README.md               # This file

Differences from Original Version

String formatting changed from f-strings to .format() method
Type hints updated for Python 3.6 compatibility
Dependency versions locked to Python 3.6.8 compatible versions
Installation script includes Python version detection

Troubleshooting

If you encounter issues:

Verify Python version: python3 --version
Check Flask version: flask --version
Review service logs: journalctl -u smeserver-password-web -f
Test with demo mode first

Support

This version is specifically designed for SME Server systems running Python 3.6.8 with Flask 2.0.3.