How do you create an advanced filtering system?

[KirkmanJ]

I would like to create a filter similar to that found on shopping websites.

See left hand side of: https://uk.rs-online.com/web/c/?sra=oss&...m=resistor

I am using python- flask model. and sqlalchemy.

Does anyone know how to go about this or can point me to an online tutorial/example/documentation so i might learn myself.