我正在从Excel中读取数据，并且我想格式化каквExcel中的数字，但是我得到了这个小错误

import pandas as pd

# 读取Excel数据
data = pd.read_excel('your_excel_file.xlsx')

# 格式化数字列
data['your_column_name'] = data['your_column_name'].map('{:.2f}'.format)

# 输出格式化后的数据
print(data)

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class ExcelFormattingExample {
    public static void main(String[] args) {
        try {
            // 读取Excel文件
            FileInputStream file = new FileInputStream("your_excel_file.xlsx");
            Workbook workbook = new XSSFWorkbook(file);
            Sheet sheet = workbook.getSheetAt(0);

            // 格式化数字列
            CellStyle numericStyle = workbook.createCellStyle();
            numericStyle.setDataFormat(workbook.createDataFormat().getFormat("0.00"));
            for (Row row : sheet) {
                Cell cell = row.getCell(0);
                if (cell != null && cell.getCellType() == CellType.NUMERIC) {
                    cell.setCellStyle(numericStyle);
                }
            }

            // 保存修改后的Excel文件
            FileOutputStream outFile = new FileOutputStream("formatted_excel_file.xlsx");
            workbook.write(outFile);
            outFile.close();

            // 关闭文件流
            file.close();
            workbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}