import openturns as ot
import openturns.viewer as otv

graph = ot.Graph("BarPlot", "X", "Y", True, "topright")
origin = 0.0
data = [[1.0, 2.0], [3.0, 4.0], [2.0, 3.0]]
barPlot = ot.BarPlot(data, origin, "orange", "shaded", "dashed", "label")
graph.add(barPlot)

otv.View(graph, figure_kw={"figsize": (6, 4)})