python实现双坐标并且画多条线，解决显示中文乱码的问题

from pylab import *
mpl.rcParams['font.sans-serif'] = ['SimHei']
import matplotlib.pyplot as plt

x_axis_data = ['步行', '自行车 ', '公共汽车', '小汽车', '地铁']  # x
y_axis_data_male_per= [0.090,0.050,0.131,0.062,0.667]  # y
y_axis_data_male_number= [22636,12539,32872,15538,167665]
y_axis_data_female_per = [0.076,0.044,0.113,0.044 ,0.722 ]  # y
y_axis_data_female_number = [13227,7754,19726,7758,126009]
fig, ax1 = plt.subplots()
ax2 = ax1.twinx()
ax1.plot(x_axis_data,y_axis_data_female_per, 'ws--', alpha=0.6, linewidth=2)
ax1.plot(x_axis_data,y_axis_data_male_per, 'ws--', alpha=0.6, linewidth=2)
ax2.plot(x_axis_data,y_axis_data_male_number, 'bs--', alpha=0.6, linewidth=2, label='男性')
ax2.plot(x_axis_data,y_axis_data_female_number, 'rs--', alpha=0.6, linewidth=2, label='女性')
plt.legend()
plt.show()