How to invert scatter plot axis

[jefsummers]

import matplotlib.pyplot as plt

ex = [0,0.2,0.5,1]
ey = [0.1, 1,2.5,4]

#plot normal
plaid = plt.scatter(ex, ey)

#now reverse axes
fig, ax = plt.subplots()
ax.scatter(ex, ey)
ax.set_xlim(1,0)
ax.set_ylim(5,-1)
ax.grid = True
plt

You might use plt.show() - I was in a notebook so just used plt