筛选一个工作簿中的所有工作表数据，原始代码如下：
import xlwings as xw
import pandas as pd
app = xw.App(visible=False, add_book=False)
workbook = app.books.open('f:\list\筛选表 - 副本.xlsx')
worksheet = workbook.sheets
table = pd.DataFrame()
for i, j in enumerate(worksheet):
values = j.range('A1').options(pd.DataFrame, header=1, index=False, expand='table').value
data = values.reindex(columns=['采购物品', '采购日期', '采购数量', '采购金额'])
table = table.append(data, ignore_index=True)
table = table.groupby('采购物品')
new_workbook = xw.books.add()
for idx, group in table:
new_worksheet = new_workbook.sheets.add(idx)
new_worksheet['A1'].options(index=False).value = group
last_cell = new_worksheet['A1'].expand('table').last_cell
last_row = last_cell.row
last_column = last_cell.column
last_column_letter = chr(64 + last_column)
sum_cell_name = '{}{}'.format(last_column_letter, last_row + 1)
sum_last_row_name = '{}{}'.format(last_column_letter, last_row)
formula = '=SUM({}2:{})'.format(last_column_letter, sum_last_row_name)
new_worksheet[sum_cell_name].formula = formula
new_worksheet.autofit()
new_workbook.save('采购分类表.xlsx')
workbook.close()
app.quit()
运行后出现FutureWarning: The frame.append method is deprecated and will be removed from pandas in a future version. Use pandas.concat instead.table = table.append(data, ignore_index=True)
因此我将12行的table = table.append(data, ignore_index=True)替换为table = pd.concat([data], ignore_index=True)，但是运行没报错但是表格没有发生任何改变 ，也就是没效果。请问，我应该怎么修改。谢谢！！