#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 x = np.random.randint(100, size=(100)) y = np.random.randint(100, size=(100)) colors = np.random.randint(100, size=(100)) plt.scatter(x, y, c=colors, cmap='Greys_r') plt.colorbar() plt.show() #Two lines to make our compiler able to draw: plt.savefig(sys.stdout.buffer) sys.stdout.flush()