testbed/matplotlib__matplotlib/galleries/examples/animation/animation_demo.py

"""
================
pyplot animation
================

Generating an animation by calling `~.pyplot.pause` between plotting commands.

The method shown here is only suitable for simple, low-performance use.  For
more demanding applications, look at the :mod:`.animation` module and the
examples that use it.

Note that calling `time.sleep` instead of `~.pyplot.pause` would *not* work.

Output generated via `matplotlib.animation.Animation.to_jshtml`.
"""

import matplotlib.pyplot as plt
import numpy as np

np.random.seed(19680801)
data = np.random.random((50, 50, 50))

fig, ax = plt.subplots()

for i, img in enumerate(data):
    ax.clear()
    ax.imshow(img)
    ax.set_title(f"frame {i}")
    # Note that using time.sleep does *not* work here!
    plt.pause(0.1)