import pandas as pd # pandas package를 이용
sample1 = pd.read_excel("http://kanggc.iptime.org/book/data/stat-1.xlsx")

print("Data of sample1 is : ",f'\n{sample1}\n')

mid = sample1['mid']
final = sample1['final']
total = sample1['total']
grade = sample1['grade']

import stemgraphic # stemgraphic package릏 이용

#create stem-and-leaf plot
fig, ax = stemgraphic.stem_graphic(total)