Sorting two lists Nov 20, 2017 Zip plus sorted allows to order two list at once: np.random.seed(4) a, b = list(np.random.randint(5, size=(2, 8))) plt.scatter(a, b, zorder=10) a, b = zip(*sorted(zip(a, b), key=lambda x: x[1])) plt.plot(a, b, alpha=0.5, zorder=5) a, b = zip(*sorted(zip(a, b), key=lambda x: x[0])) plt.plot(a, b, alpha=0.8, zorder=4) # if a and b need to be lists then a, b = (list(t) for t in zip(*sorted(zip(a, b), key=lambda x: x[0]))) <?xml version=”1.0” encoding=”utf-8” standalone=”no”?>