[Python] How to schedule a daily email report with attachments in a DeepFace-based attendance...

I'm building a face recognition attendance system using DeepFace, with attendance logs exported to Excel and snapshots stored per detection. I plan to use Flask for the web UI and want to schedule daily email reports with attached Excel files and optional snapshot links.

I've stored SMTP credentials in a .env file. The email should be sent at 18:00 every day automatically.

How can I best implement this email scheduling in Python (preferably using Flask or background scheduler like APScheduler) while keeping things modular and secure?

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