How to Make a Real time Plot or Figure in Python

import time
import matplotlib.pyplot as plt
import random

fig = plt.figure()
ax = fig.add_subplot()
fig.show()
x = []
n = 150 # number of data points

for i in range(n):
    x.append(random.randint(0,100))
    ax.plot(x, color='r')
    fig.canvas.draw()
    ax.set_xlim(left=max(0, i - 50), right=i + 3)
    time.sleep(0.01)
plt.show()