4.1. tkwant.system – Tools for time-dependent and open Kwant systems

add_time_to_params(params, time_name, time)	Add a time_name: time key-value pair to a params dict.
is_time_dependent_function(obj, time_name)	Return True if obj is callable and has a time argument
orb_range(syst, site)	Return the first orbital of this and the next site.
ExtendedSystem(syst, H0, boundary_slices, …)	Hamiltonian matrix of central system + boundary conditions.