make background white matplotlib code example

Example 1: matplotlib background color

fig, ax = plt.subplots()
#to change the inside of the graph
ax.set_facecolor('xkcd:salmon')
ax.set_facecolor((1.0, 0.47, 0.42))
#to change the border color around the back
fig.patch.set_facecolor('xkcd:mint green')

Example 2: plt text matplotlib white background

import numpy as np
import matplotlib.pyplot as plt
plt.figure()
ax = plt.subplot(111)
plt.plot(np.linspace(1,0,1000))
t = plt.text(0.03,.95,'text',transform=ax.transAxes,backgroundcolor='0.75',alpha=.5)
plt.show()