annotate a plot using matplotlib

Question

I am using this to making a plot with contains in specific moment something such as highlight

plt.axis(\'normal\')
plt.axvspan(76, 76, facecolor=\'g\', alpha         


        

Answer 1

Here's how you can have an arrow showing to the span:

import matplotlib.pyplot as plt

plt.axvspan(76, 76, facecolor='g', alpha=1)
plt.annotate('This is awesome!', 
             xy=(76, 0.75),  
             xycoords='data',
             textcoords='offset points',
             arrowprops=dict(arrowstyle="->"))
plt.show()

For more info about annotate see docs.

The output of the above code: