Hello!
I think there is a problem with matplotlib annotation_clip value while using it to place a comment outside the main plot area. Surprisingly, but it works in jupyter notebook.

Matplotlib version: 1.5.1
Platform: Linux
Backend: Qt, TkAgg
Installed using: pip
To help us understand and resolve your issue please check that you have provided
the information below.

Minimal working example:

import numpy as np
import matplotlib.pyplot as plt

fig = plt.figure()
ax = fig.add_subplot(111)
x = np.arange(0,1,0.001)
y = 0.5*np.sin(x) + np.cos(x)**2
ax.plot(x,y)

ax.annotate('Test annotation', xy=(1.5, 1.5), xycoords='data', annotation_clip=False)
plt.show()