import matplotlib.pyplot as plt
import numpy as np
plt.clf()
# using some dummy data for this example
xs = np.arange(0,10,1)
ys = np.random.normal(loc=2.0, scale=0.8, size=10)
plt.plot(xs,ys)
# text is left-aligned
plt.text(2,4,'This text starts at point (2,4)')
# text is right-aligned
plt.text(8,3,'This text ends at point (8,3)',horizontalalignment='right')
plt.show()