【python】实例-读取已有文件的内容

import os
Filename=raw_input("please input filename that you will open: ")
if os.path.exists(Filename):##检查文件是否存在
    try:
        Filehandle=open(Filename,"r")

    except Exception,e: ##捕获Exception的错误 存储到e里面。其中Exception是异常的基类
        print e

    else:
        for words in Filehandle:
            print words
        Filehandle.close()
else:
    print "%s not exits"%Filename