'turtle' graphics animation by matplotlib, FuncAnimation and AnnotationBbox.

cactus_graphics.py

%matplotlib inline
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.offsetbox import OffsetImage, AnnotationBbox 
from IPython.display import HTML
from matplotlib.animation import FuncAnimation

fig, ax = plt.subplots(figsize=(16,9)) 
image = 'cactus7.png' 
image = plt.imread(image) 
im = OffsetImage(image, zoom=.3) 

artists = [] 
xdata, ydata = [0], [0]
ln, = plt.plot(xdata, ydata, 'r', lw=9, animated=True)
annotation = AnnotationBbox(im,(xdata[0], ydata[0]),xycoords='data', frameon=False)
artists.append(ax.add_artist(annotation))

def init():
    ax.set_xlim(-25, 25)
    ax.set_ylim(-25, 25)
    ax.set_aspect('equal')
    ax.axis('off')    
    #ax.patch.set_facecolor('gold')  # 図全体の背景色

def update(i):
    x_i = 0.5 * i * np.cos(i)
    y_i = 0.5 * i * np.sin(i)
    xdata.append(x_i)
    ydata.append(y_i)
    ln.set_data(xdata, ydata)
    annotation.xybox = (x_i,y_i)

    return ln, annotation

ani = FuncAnimation(fig, update, frames=np.linspace(0, 16*np.pi, 300),
                    interval=100,init_func=init, blit=False)
HTML(ani.to_html5_video())
#dpi=100
#ani.save('rasen.mp4', writer="ffmpeg",dpi=dpi)