使用while循环遍历文件

/* 使用while循环遍历文件*/
[root@localhost test1]# vim 17.py
//add
#!/usr/bin/python

ll = open(‘/tmp/1.txt‘)
while True:
    line = ll.readline()
    if not line:
        break
    print line,

[root@localhost test1]# python 17.py
abc
sjdh

/* 另外一种写法，（常用），省去了去把变量关闭 */
[root@localhost test1]# vim 17.py
//add
#!/usr/bin/python

with open(‘/tmp/1.txt‘) as ll:
    while True:
      line = ll.readline()
      if not line:
          break
      print line,

[root@localhost test1]# python 17.py
abc
sjdh