glob.glob('*.txt') 

import os
import pandas
import codecs
import glob
import pandas as pd
os.getcwd()
os.chdir('D:\AAAASXQ\python study\data preprocessing')
def txtcombine()：
 
 files = glob.glob('*.txt')
 
 all = codecs.open('all.txt','a')
 
 for filename in flist: 
 print(filename) 
 fopen=codecs.open(filename,'r',encoding='utf-8') 
 lines=[] 
 lines=fopen.readlines() 
 fopen.close() 
 i=0 
 for line in lines: 
  for x in line: 
  all.write(x)
 #读取为DataFrame格式
 all1 = pd.read_csv('all.txt',sep=' ',encoding='GB2312')
 #保存为csv格式
 all1.to_csv('all.csv',encoding='GB2312')
 
if __name__ == '__main__': 
 txtcombine()