Make a histogram with labeled bars

labeled_histogram.py

import numpy as np
import matplotlib.pyplot as plt

def label_bars(rects):
    # attach some text labels to the bars
    for rect in rects:
        height = rect.get_height()
        plt.text(rect.get_x()+rect.get_width()/2., 
                 height, str(int(height)),
                 ha='center', va='bottom')

data = np.random.normal(5., 1., size=1000)

n, bins = np.histogram(data, bins=25)

bin_centers = (bins[1:]+bins[:-1])/2.
width = bin_centers[1]-bin_centers[0]
bars = plt.bar(bin_centers, n, width,
        color='g', edgecolor='none')

label_bars(bars)

plt.show()