alphab = ['A', 'B', 'C', 'D', 'E', 'F']
frequencies = [23, 44, 12, 11, 2, 10]
pos = np.arange(len(alphab))
width = 1.0
ax = plt.axes()
ax.set_xticks(pos + width / 2)
ax.set_xticklabels(alphab)
plt.bar(pos, frequencies, width, color='r')
plt.show()
График гистограммы в Python