import openpyxl,os

os.chdir('D://')
a = input('输入文件名：')
n = eval(input('第N行开始？'))
m = eval(input('插入M行？'))
wb = openpyxl.load_workbook(a)  
sheet = wb.active
i = sheet.max_row
if n >= i:
    print('超出行数！最大行数为' + str(i))

while i >= n:
    for j in range(1,sheet.max_column+1):
        sheet.cell(row=i+m,column=j).value = sheet.cell(row=i,column=j).value
    i -= 1

for q in range(n+1,n+m+1):
    for j in range(1,sheet.max_column+1):
        sheet.cell(row=q,column=j).value = ''

wb.save(a)

print('Done!')