python新手，想请教个问题

魔鬼的惊叹

the_file = open("test.txt")
for each_line in the_file:
     print each_line


对于for each_line in the_file每次从文件中读一行吗？为什么呢？

donalds2008

找本入门语法书cc

hjfeng1988

1. for i in ('a','b','c'):
   
2.     print i

复制代码

如果改为这样，是不是清楚很多
the_file = open("test.txt")
line = the_file.readlines()
这时的变量line其实是一个序列，类似这样['1st line\n','2nd line\n','3rd line\n']
所以for each_line in the_file就变成类似以下
for each_line in ['1st line\n','2nd line\n','3rd line\n']

魔鬼的惊叹

回复 3# hjfeng1988
多谢。