Python Forum

I am trying to update a plot as fast as possible. The quickest way I found so far is in this post, where a line plot updates very quickly using a while loop. This is the code that updates a line amazingly fast:

import time
import numpy as np
import matplotlib.pyplot as plt

fig, ax = plt.subplots()
line, = ax.plot(np.random.randn(100))

fig.canvas.draw()
plt.show(block=False)


tstart = time.time()
num_plots = 0
while time.time()-tstart < 5:
    line.set_ydata(np.random.randn(100))
    ax.draw_artist(ax.patch)
    ax.draw_artist(line)
    fig.canvas.blit(ax.bbox)
    fig.canvas.flush_events()
    num_plots += 1

Now I want to include text (which updates as quickly as the lines) in the plot (it can be within the plot area, eg like a legend) or as the title of the plot, both would be fine. I tried different ways but it doesn't work (text is updated only when the loop ended).

Is there a way to update text as quickly as line? (as mentioned, updating a set.text or alike within the while loop does not work)