Python读文件

读取文件第一行内容：

for c in open('7.py','r').readline():

	print c,

else:

	print 'readline is over!'

 打印结果为：

root@IdeaPad:~/test# python 8.py 

s 1   =   ' w w w . e v i l x r . c o m ' 

readline is over!

---

用Python实现文件内容的拷贝：

root@IdeaPad:~/test# cat 9.py 

for ss in open('7.py','r').readlines():

	open('evilxr.txt','a+').write(ss)

 运行该python后会在该目录下生成一个名为evilxr.txt的文件，该文件的内容和7.py的一样：

root@IdeaPad:~/test# ls

1.txt  4.py  7.py   9.py        ac.tar      aobama      newfile

2.txt  5.py  8.py   aa.tar.gz   ac.tar.bz2  evilxr

3.py   6.py  8.py~  ab.tar.bz2  ac.tar.gz   evilxr.txt

root@IdeaPad:~/test# cat evilxr.txt 

s1 = 'www.evilxr.com'

ev = [1,3,4,5,6,7,86,120]



i = 0

for c in s1:

	print format (i,'2d'), c

	i = i + 1

else:

	print 'The for is out!'





i = 0

for evilxr in ev:

	print format(i,'2d'),evilxr

	i = i + 1



print 'This is New!'



tup = (1,2,3,4,5)

for t in tup:

	print t

else:

	print 'This is tup!'

root@IdeaPad:~/test#