Example of using Matplotlib library to display data on graphs. More at https://matplotlib.org/.

matplotlib_example.py

from matplotlib import pyplot as plt

#Set data to display > [lists]
x = [1,7,5,2]
y1 = [5,6,3,9]
y2 = [7,8,4,0]

#Create plots with line colors and marker style
plt.plot(x, y1, color="pink", marker="o")
plt.plot(x, y2, color="gray", marker="o")

#Assign title, labels and legend
plt.title("Two Lines on One Graph")
plt.xlabel("Amazing X-axis")
plt.ylabel("Incredible Y-axis")
plt.legend(["x label", "y1 label", "y2 label"])

#Show Plot
plt.show()