import mesh2scattering.input as m2si
import pyfar as pf
bc = m2si.bc.BoundaryCondition(
    kind=m2si.bc.BoundaryConditionType.pressure,
    values=0,
)
mapping = m2si.bc.BoundaryConditionMapping(100)
mapping.add_boundary_condition(bc, 0, 99)  # apply to all elements