Matplotlib patch animation

anim.py

import numpy as np
import matplotlib
import matplotlib.pyplot as plt
from matplotlib import animation
from matplotlib.collections import PatchCollection

fig = plt.figure()
ax = plt.axes(xlim=(-1.5, 1.5), ylim=(-1.5, 1.5), aspect='equal')

# not visible
circle = matplotlib.patches.Circle((-10.0, -10.0), 0.2, color='blue')

collection = PatchCollection([circle])
ax.add_collection(collection)
ax.add_patch(circle)

def init():
    circle.center = (np.sin(0.0), np.cos(0.0))
    return collection,

def animate(i):
    circle.center = (np.sin(i/30), np.cos(i/30))
    return collection,

anim = animation.FuncAnimation(fig, animate, init_func=init, interval=20, blit=True, frames=300)
anim.save('motion.mp4', fps=30, dpi=70, extra_args=['-vcodec', 'libx264'])

plt.show()

ho.mp4

ver.mp4