记录：Excel 大文件（＞256行 || ＞ 256列）读取与写入（openpyxl包）

def stringToFloat(base_dir, name, output_dir):
    wb = openpyxl.Workbook()
    writer_sheet = wb.active

    raw = openpyxl.load_workbook(base_dir + name)
    raw_sheet = raw['Sheet1']
   
    # print(raw.nrows, raw.ncols)
    for i in range(0, raw_sheet.max_row):
        for j in range(0, raw_sheet.max_column):
            if i == 0:
                writer_sheet.cell(i + 1, j + 1, raw_sheet.cell(row =i + 1,  column = j + 1).value)
                continue
            else:
                print(i+1,j+1)
                writer_sheet.cell(i+1, j+1, float(raw_sheet.cell(i+1, j+1).value))
    wb.save(name)