Sort y axis by descening values matplotlib

[mrsenorchuck]

See below code, the problem with this logic is that I want the y axis to be in a descending format where a league position of 1 is higher that 5.

How can I set it up that the y axis is descending?

import matplotlib.pyplot as xyz
year = [2016,2017,2018]

leaguepos = [1,10,5]

points = [90,50,70]

xyz.bar(points,leaguepos,
label=year,width=.5)
xyz.legend()
xyz.xlabel('Points')
xyz.ylabel('League Position')
xyz.title('League Performance')
xyz.show()