SQLAlchemy (Model) - defines the table structures of the user's database and how to link them to Python objects the user's controller can interact with.
With the availability of low-cost LEDs, many different variants have become available, featuring different colours, sometimes changing automatically or in a user-controllable way.
Moreover, smokers and PNV users control very precisely, on a puff-by-puff basis, the dose of nicotine they consume, virtually eliminating the risk of overdose.
This means effective end-user controls, along with Member State records of lost or stolen materials, remain important in limiting inadvertent supplies to Al-Qaida associates.