python openpyxl 多个sheet vlookup

import pandas as pd
import openpyxl
from openpyxl.styles import Border, Side,colors

wb = openpyxl.load_workbook('../xlwings/vlookup.xlsx')
sheet1 = wb.sheetnames[0]
df_total = pd.read_excel('../xlwings/vlookup.xlsx',sheet_name=sheet1)
students_dic = {
    '姓名':[],
    '电话':[],
    '班级':[]

}
for sheet_name in wb.sheetnames[1:]:
    sheet = wb[sheet_name]
    for row in sheet.iter_cols(min_row=2, max_row=sheet.max_row, min_col=1,max_col=1):
        for cell in row:
            students_dic['姓名'].append(cell.value)
            cell.value = sheet_name[:2]
            students_dic['班级'].append(cell.value)
    for row in sheet.iter_cols(min_row=2, max_row=sheet.max_row, min_col=2,max_col=2):
        for cell in row:
            students_dic['电话'].append(cell.value)

df_students = pd.DataFrame(data=students_dic)
df_merge = pd.merge(left=df_total,right=df_students,left_on=["班级","姓名"],right_on=["班级","姓名"])
df_merge["电话号码"] = df_merge["电话"]
df_merge.drop(columns="电话",inplace=True)
df_merge = df_merge.sort_values("班级")
df_merge.to_excel('../xlwings/result2_vlookup.xlsx',index=False)

border = Border(
    left=Side(border_style="medium", color=colors.BLACK),
    right=Side(border_style="medium", color=colors.BLACK),
    top=Side(border_style="medium", color=colors.BLACK),
    bottom=Side(border_style="medium", color=colors.BLACK)
)

wb2 = openpyxl.load_workbook('../xlwings/result2_vlookup.xlsx')
sheet2 = wb2.active
sheet2.title = "多个sheet_vlookup_多列"
for row in sheet2.iter_rows(min_row=1,max_row=sheet2.max_row, min_col=1, max_col=sheet2.max_column):
    for cell in row:
        cell.border=border
wb2.save('../xlwings/result2_vlookup.xlsx')