When I make an errorbar plot from pandas Series, the names of the series appear twice in the legend. Once as a solid line, and once as a solid line with error bars. Explicitly setting the label argument replaces the label text for the solid line with errorbars.

%matplotlib inlineimport matplotlib.pyplot as pltimport pandas as pdimport numpy as npdf = pd.DataFrame(data = np.random.rand(10,3),index=pd.Series(np.arange(0,20,2),name="number"),columns="A B C".split())plt.errorbar(df.index,df.A,df.B)plt.legend()