python like datastructures as databases code examples

[monkyyy]

`shapes.filter(isnt:shapeenum.isstatic)`
https://forum.dlang.org/thread/apbcqxiifbsqdlrsluol@forum.dlang.org

I know its possible to make complex, datastructure aware filters, 
but I never done it

what patterns do people use? lets say you have an always sorted 
array and the user is asking for values between 100 and 200 
`array.filter(above:100,below:200)`; obviously possible but maybe 
theres some details that will make my life easier

how yall implement such things?