使用pandas合并结构相同的csv文件

#encoding=utf-8
import pandas as pd
import os
import csv

def concat_csv(filename,dirpath):
    with open(filename,'w') as f:
        cw=csv.writer(f)
        cw.writerow(['column1','column2'])
        
    for inputfile in os.listdir(dirpath):
        order=['column1','column2']
        df=pd.read_csv(dirpath+inputfile,encoding='utf-8-sig')
        try:
#             对字段进行排序
            df=df[order]
            df.to_csv(filename, mode='a', index=False, header=False,encoding='utf-8-sig')
        except Exception as e:
            print(e,inputfile,df.columns)

            
if __name__=='__main__':
    filename='result.csv'
    dirpath='d:/'
    concat_csv(filename,dirpath)