Python实现将目录中TXT合并成一个大TXT文件的方法

#coding=gbk
import os
import sys
import glob
def dirTxtToLargeTxt(dir,outputFileName):
 '''从dir目录下读入所有的TXT文件,将它们写到outputFileName里去'''
 #如果dir不是目录返回错误
 if not os.path.isdir(dir):
 print "传入的参数有错%s不是一个目录" %dir
 return False
 #list all txt files in dir
 outputFile = open(outputFileName,"a")
 for txtFile in glob.glob(os.path.join(dir,"*.txt")):
 print txtFile
 inputFile = open(txtFile,"rb")
 for line in inputFile:
 outputFile.write(line)
 return True
if __name__ =="__main__":
 if len(sys.argv) < 3:
 print "Usage:%s dir outputFileName" %sys.argv[0]
 sys.exit()
 dirTxtToLargeTxt(sys.argv[1],sys.argv[2])