[Python] How can I implement a two-step security system with fingerprint and facial...

I'm working on a two-step security system using Python in PyCharm. The goal is to authenticate employees using both fingerprint and facial recognition, and if both are successful, the system should trigger an electric door lock to open.

Here’s what I’m using:

• A fingerprint sensor (ZKTeco model)
• A webcam for facial recognition
• A relay module connected to the electric lock
• Python 3.x (running in PyCharm on Windows)

So far, I have:

• Captured and verified fingerprints using [ZKTeco SDK or other library]
• Implemented basic facial recognition with the face_recognition library (and OpenCV)

What I need help with:

1. How to combine both steps (fingerprint + face) so the system only opens the lock when both are successfully verified.
2. What is the best way to control the relay (via USB, GPIO, or serial)?
3. If anyone has a working flow or example project combining both biometrics and hardware control.

Any suggestions, code samples, or resources are greatly appreciated. Thank you in advance!

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