Can't get bar chart to plot in matplotlib?

Using this code, x = [420.0, 4353.0, 4373.0]; y = [269.0, 252.0, 283.0] plt.bar(x,y) plt.show() I get: Where ...

c3 getting bar length and width or x/y coordinates?

I was looking into a using c3 as a rendering library. Explorer the API, I found a requirement that might not be doab...