# -*- coding: utf-8 -*- #python 27 #xiaodeng #Python学习手册 868 #with/as上下文管理器 #with语句的基本格式: with open(r'c:missdata') as myfile: for line in myfile: print line #说明: #对open的调用,会返回一个简单文件对象 #其上用法意义如下: myfile=open(r'c:\missdata') try: for line in myfile: print line finally: myfile.close()