//println("starting test now")

/*

import scala.concurrent._

import scala.concurrent.duration._

import ExecutionContext.Implicits.global

import scala.language.postfixOps 

val urban_prices = List(List(Some(71.539941), None), 

                        List(Some(76.974614), None), 

                        List(Some(65.226685), Some(6.35)), 

                        List(Some(78.354649), Some(12.241)), 

                        List(Some(85.517645), Some(38.188)))

val urban_prices = List(List(Some(311.349976), Some(27.505054)), 

			List(Some(300.222351), Some(42.357094)), 

			List(Some(330.555054), Some(52.852215)))

assert(get_deltas(urban_prices) == List(List(Some(-0.03573992567129673), Some(0.5399749442411563)), 

                                        List(Some(0.10103412653643493), Some(0.2477771728154912))))