Multi-Y-axis
from mpl_toolkits.axes_grid.parasite_axes import SubplotHost
import matplotlib.pyplot as plt
import numpy as np
#data
x = (1, 3, 4, 6, 8, 9, 12)
y1 = (0, 1, 2, 2, 4, 3, 2)
y2 = (0, 3, 2, 3, 6, 4, 5)
y3 = (50, 40, 40, 30, 20, 22, 10)
y4 = (0.2, 0.5, ...