openpyxl Python中的Excel公式

如果不满足指定条件，则需要使用openpyxl库删除excel中的行。行中的单元格包含一些带有相对单元格引用的公式。删除行时，以下单元格中的公式不会更新。但是，当我们在excel中执行相同操作时，以下单元格中的公式将自动更新。我不知道我哪里错了。任何建议都会非常有帮助。下面是示例代码。

import base64
import os
import io
import openpyxl

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decrypted=base64.b64decode(data)
xls_filelike = io.BytesIO(decrypted)
wb = openpyxl.load_workbook(xls_filelike)
sheet=wb['Sheet1']

if int(sheet['D4'].value)<75:
    sheet.delete_rows(4,1)

wb.save('Sample.xlsx')