I have 2 y points for each x points. I can draw the plot with this code:

import matplotlib.pyplot as pltx = [0, 2, 4, 6]
y = [(1, 5), (1, 3), (2, 4), (2, 7)]plt.plot(x, [i for (i,j) in y], 'rs', markersize = 4)
plt.plot(x, [j for (i,j) in y], 'bo', markersize = 4)plt.xlim(xmin=-3, xmax=10)
plt.ylim(ymin=-1, ymax=10)plt.xlabel('ID')
plt.ylabel('Class')
plt.show()

This is the output:

How can I draw a thin line connecting each y point pair? Desired output is:

just add plt.plot((x,x),([i for (i,j) in y], [j for (i,j) in y]),c='black')