完成功能：

　　从指定位置读文件到控制台

#! /usr/bin/python# coding=utf-8方法一、try:        f = open ('/root/python/file/001.txt','r' )        print(f.read())finally:        if f:           f.close()方法二、with open('/root/python/file/001.txt','r') as f:        print (f.read())方法三、f = open ('/root/python/file/001.txt','r' )for line in f.readlines():        print (line.strip())

效果：

[root@localhost python]# ./004_IO-test.py 111111111111111222222222222222333333333333333