python读取excel的行数

from openpyxl import load_workbook

 1 from openpyxl import load_workbook
 2 wb = load_workbook(filename=r'C:\\Users\\Administrator\\Desktop\\库存大表0803.xlsx')  ##读取路径
 3 ws = wb.get_sheet_by_name("Sheet1")  ##读取名字为Sheet1的sheet表
 4 num = 1
 5 
 6 while 1:
 7     cell = ws.cell(row=num, column=1).value
 8     if cell:
 9         num = num +1
10     else:
11         print(num)
12         exit()

while 1:

cell = ws.cell(row=num, column=1).value

if cell:
    num = num +1

else:
    print(num)
    exit()