

the above plots different legend
i want fix the range of the lengend
my code is here
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()