python中for语句使用
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root@ubuntu:~/dongbo/tools/python/day2# vi diedai.py
#!/usr/bin/env python
#_*_ coding:utf-8 _*_
for i in "test.txt":
print i,
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root@ubuntu:~/dongbo/tools/python/day2# python diedai.py
t e s t . t x t
root@ubuntu:~/dongbo/tools/python/day2#
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可以发现是将test.txt打印出来，没有去查找test.txt文件。
下面是将文件内容打印出来了。
root@ubuntu:~/dongbo/tools/python/day2# cat diedai.py
#!/usr/bin/env python
#_*_ coding:utf-8 _*_
f =file("/root/dongbo/tools/python/day2/test.txt")
for i in f:
print i,
root@ubuntu:~/dongbo/tools/python/day2#
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root@ubuntu:~/dongbo/tools/python/day2# python diedai.py
wo ai ni chenxiaoyandongbo
dongbo ai chenxiaoyan
下面的方式就是把每个字符打印出来了。
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root@ubuntu:~/dongbo/tools/python/day2# cat diedai.py
#!/usr/bin/env python
#_*_ coding:utf-8 _*_
f =file("/root/dongbo/tools/python/day2/test.txt")
for i in f.readline():
print i,
root@ubuntu:~/dongbo/tools/python/day2# python diedai.py
w o a i n i c h e n x i a o y a n d o n g b o
root@ubuntu:~/dongbo/tools/python/day2#
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