Python实现将目录中TXT合并成一个大TXT文件的方法

#coding=gbkimport osimport sysimport globdef 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 Trueif __name__ =="__main__":  if len(sys.argv) < 3:    print "Usage:%s dir outputFileName" %sys.argv[0]    sys.exit()  dirTxtToLargeTxt(sys.argv[1],sys.argv[2])