import pandas as pd
import matplotlib.pyplot as plt
df=pd.read_excel('某店铺促销方式分析.xlsx')
plt.rcParams['font.sans-serif']='SimHei'
plt.pie(x=df['购买人数'],labels=df['促销方式'],
        autopct='%.2f%%',startangle=90,counterclock=False,
            wedgeprops={'linewidth':1,'edgecolor':'white'})
plt.title('某店铺不同促销方式下购买人数占比饼图')
plt.show()