In [15]:
import matplotlib.pyplot as plt
import numpy as np
from matplotlib import animation 

fig, ax = plt.subplots()
line, = ax.plot(x, np.sin(x))

def animate(i):
    line.set_ydata(np.sin(x+i/10))
    return line,

def init():
    line.set_ydata(np.sin(x))
    return line,

ani = animation.FuncAnimation(fig=fig,func=animate,frames=100,init_func=init,interval=20,blit=False)
plt.show()