In the current implementation of Axes.grouped_bar, calling the function with label or color keyword arguments can result in a TypeError: matplotlib.axes._axes.Axes.bar() got multiple values for ...

plt.bar(range(3), [1, 3, 2], tick_label=['very long tick labels'] * 3) plt.tick_params(rotation=30) The rotated labels do not "point" to the ticks anymore, which can make it difficult to see which ...