如何获取动态单元格列表的最大值？

import openpyxl

def get_max_value(file_path, sheet_name, start_cell, end_cell):
    workbook = openpyxl.load_workbook(file_path)
    sheet = workbook[sheet_name]
    
    max_value = None
    
    for row in sheet[start_cell:end_cell]:
        for cell in row:
            if cell.value is not None:
                if max_value is None or cell.value > max_value:
                    max_value = cell.value
    
    return max_value

# 使用示例
file_path = 'example.xlsx'
sheet_name = 'Sheet1'
start_cell = 'A1'
end_cell = 'A10'

max_value = get_max_value(file_path, sheet_name, start_cell, end_cell)
print("最大值为:", max_value)