matplotlib：直方图和 bin 标签

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:

如您所见，每个 x 标签的末尾未与其 bin 的中心对齐。我的想法是：当我应用 45 度旋转时，标签围绕其几何中心旋转。我想知道是否可以将枢轴移至标签顶部。 （或者简单地将所有标签稍微向左翻译。）

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()

Use:

ax.set_xticklabels(names,rotation=45, rotation_mode="anchor", ha="right")

输出是：