I want fix the windspeed range

[satya0210]

here is


my windrose plots
I want to compare them in different seasons
when I was plotting them the legend which represents wind speed is changing from plot to plot
I want to give a limit to the windspeed range
here is my code

from windrose import WindroseAxes
from matplotlib import pyplot as plt
import matplotlib.cm as cm
from numpy.random import random
from numpy import arange
import pandas as pd
MON=pd.read_csv(r'data.csv')
ws = MON["Ws"].values
wd = MON["Wd"].values
ax = WindroseAxes.from_ax()
ax.set_ylim(0,50)
ax.bar(wd, ws, normed=True, opening=0.8, edgecolor='white')
ax.set_title('plot2')
ax.set_legend()

ax_ylim is not working