python画图怎么添加汉字的坐标轴

import matplotlib.pyplot as plt

import numpy as np

val_ls = [np.random.randint(100) + i*20 for i in range(7)]

scale_ls = range(7)

plt.bar(scale_ls, val_ls)

plt.title('Average customer flows Number by Weekdays')

import matplotlib.pyplot as plt

import numpy as np

#设置使用的字体为支持中文的字体

plt.rcParams['font.sans-serif']=['SimHei']

plt.rcParams['axes.unicode_minus'] = False

val_ls = [np.random.randint(100) + i*20 for i in range(7)]

scale_ls = range(7)

index_ls = ['星期一','星期二','星期三','星期四','星期五','星期六','星期日']

plt.bar(scale_ls, val_ls)

_ = plt.xticks(scale_ls,index_ls) ## 可以设置坐标字

plt.title('Average customer flows Number by Weekdays')