Creating 3 Pie Charts in Python

import matplotlib.pyplot as plt
import numpy as np
x = np.array([33, 27, 22, 18]) #33% 27% 22% 18%
y = np.array([36, 24, 19, 21]) #36% 24% 19% 21%
z = np.array([31, 29, 26, 14]) #31% 29% 26% 14%
plt.pie(x) #shows variable x
plt.show()
plt.pie(y) #shows variable y
plt.show()
plt.pie(z) #shows variable z
plt.show()