Dear Kwant Developers,

I am using kwant.physics.Bands to obtain the bands for a three-dimensional setup with one 'momentum'. Hence, I am inserting a set of momenta and getting a set of energies for each momentum. 

Is there a way to ask Kwant to only compute the lowest bands? My system is quite large and calculating all the bands is extremely time-consuming. 

Thank you!

Cheers,
Vardan.