openpyxl：读取 Excel 计算的单元格值data_only=True但检测格式例如百分比

如何解决openpyxl：读取 Excel 计算的单元格值data_only=True但检测格式例如百分比

我一方面找到了检测多种格式和数据类型的解决方案，另一方面找到了避免无法在 Python 中计算的公式的解决方案。但是，我没有找到可以生成所有计算公式并保留格式信息的解决方案，在我的情况下，如果数字是百分比值。这是否可以不读取 Excel 文件两次？

目前，我使用了以下令人不满意的代码（这符合我的要求，但我认为它一团糟）：

@dataclass
class ExcelSheet:
    title: str
    lines: List [List [str]]

class ExcelDocument:
    def __init__ (self):
        self.absFilePath = ""
        self.sheets: List [ExcelSheet] = []

    def read (self,absFilePath: str):
        workBookValues = openpyxl.load_workbook (absFilePath,read_only=True,data_only=True)
        workBookAll = openpyxl.load_workbook (absFilePath)

        # copy all content into an ExcelSheet list;
        # both classes exist from xlrd times ("historic reasons") -
        # keep existing applications unchanged - and shall not be removed)
        for sheet in workBookAll:
            self.sheets.append (thisSheet := ExcelSheet (sheet.title,[]))

            iLine = 1
            for line in sheet.iter_rows ():
                thisSheet.lines.append ([])
                myLine: List [str] = thisSheet.lines [-1]

                iCell = 0
                for cell in line:
                    # convert a pure date from datetime to date in order to avoid datetimes with time 0:00:00
                    if cell.data_type == 'n'  and  '%' in cell.number_format:
                        myLine.append ((cell.value * 100,'%'))

                    if (cell.data_type == 'd'  and
                        "h:m" not in cell.number_format  and
                        "m:s" not in cell.number_format  and
                        str (cell.value).endswith (" 00:00:00")):
                        myLine.append (cell.value.date ())

                    elif cell.data_type == 'f':
                        myLine.append (workBookValues [sheet.title] [iLine] [iCell].value)

                    else:
                        myLine.append (cell.value)
                    iCell+=1
                iLine+=1

顺便说一句，如果有人能解释为什么接下来，我打开 workBookAll read_only 后立即执行以下代码失败（无法执行），我将不胜感激：

            for mergedCells in sheet.merged_cells.ranges:
                refCellValue: any = sheet [mergedCells.bounds [1]] [mergedCells.bounds [0] - 1].value

                for iLine in range (mergedCells.bounds [1],mergedCells.bounds [3] + 1):
                    for iCell in range (mergedCells.bounds [0] - 1,mergedCells.bounds [2]):
                        thisSheet.lines [iLine - 1] [iCell] = refCellValue