matplotlib: histogram and bin labels

I'm trying to plot a histogram with bar chart, and I'm having difficulties figuring out how to align the x-axis labels with the actual bins. The code below generates the following plot: as you can see, the end of each x-label is not aligned to the center of its bin. The way i'm thinking about this is: when i apply a 45-degree rotation, the label pivots around its geometrical center. I was wondering if it's possible to move the pivot up to the top of the label. (Or simply translate all the labels slightly left.) ``` import matplotlib.pyplot as plt import numpy as np #data np.random.seed(42) data = np.random.rand(5) names = ['A:GBC_1233','C:WERT_423','A:LYD_342','B:SFS_23','D:KDE_2342'] ax = plt.subplot(111) width=0.3 bins = map(lambda x: x-width/2,range(1,len(data)+1)) ax.bar(bins,data,width=width) ax.set_xticks(map(lambda x: x, range(1,len(data)+1))) ax.set_xticklabels(names,rotation=45) plt.show() ```