def pick_gradient_value(grad_list, gradient_level):
	return grad_list[int(round(gradient_level * (len(grad_list) - 1) / 100))]
compute intron overrun.
dataset/ETHPy150Open powerline/powerline/powerline/colorscheme.py/pick_gradient_value--crossover with--dataset/ETHPy150Open CGATOxford/cgat/obsolete/pipeline_kamilah.py/makeOverrun