无法使用变量作为位置检索Openpyxl中的单元格数据

from openpyxl import load_workbook

# 加载Excel文件
workbook = load_workbook('example.xlsx')

# 选择工作表
sheet = workbook['Sheet1']

# 获取A1单元格的数据
data = sheet.cell(row=1, column=1).value

print(data)

from openpyxl import load_workbook

# 加载Excel文件
workbook = load_workbook('example.xlsx')

# 选择工作表
sheet = workbook['Sheet1']

# 定义行号和列号的变量
row_num = 2
col_num = 3

# 根据变量获取单元格数据
data = sheet.cell(row=row_num, column=col_num).value

print(data)