#Three lines to make our compiler able to draw: import sys import matplotlib matplotlib.use('Agg') import matplotlib.pyplot as plt import numpy as np y1 = np.array([3, 8, 1, 10]) y2 = np.array([6, 2, 7, 11]) plt.plot(y1) plt.plot(y2) plt.show() #Two lines to make our compiler able to draw: plt.savefig(sys.stdout.buffer) sys.stdout.flush()