如何在openpyxl条件格式中使用占位符？

from openpyxl import Workbook, load_workbook
wb = load_workbook('example.xlsx')

ws = wb.active
cell_range = ws['A1:A10']

from openpyxl.styles import PatternFill
from openpyxl.styles.differential import DifferentialStyle
from openpyxl.formatting.rule import Rule

# 创建条件格式规则
rule = Rule(type="expression", dxf=DifferentialStyle(fill=PatternFill(start_color="FF0000", end_color="FF0000")))

# 设置条件格式公式
rule.formula = 'A1 > 10'  # 这里可以使用占位符，例如 'A1 > %s' % (placeholder)

# 将规则应用到单元格范围
ws.conditional_formatting.add(cell_range, rule)

wb.save('example.xlsx')
wb.close()