How to update matplotlib's imshow() window interactively?

Question

I\'m working on some computer vision algorithm and I\'d like to show how a numpy array changes in each step.

What works now is that if I have a simple imshow(

Answer 1

If you are using Jupyter, maybe this answer interests you. I read in this site that the emmbebed function of clear_output can make the trick:

%matplotlib inline
from matplotlib import pyplot as plt
from IPython.display import clear_output

plt.figure()
for i in range(len(list_of_frames)):
    plt.imshow(list_of_frames[i])
    plt.title('Frame %d' % i)
    plt.show()
    clear_output(wait=True)

It is true that this method is quite slow, but it can be used for testing purposes.