exercise15 读取文件

运行文件ex15.py

ex15_sample.txt  //记事本的内容

This is stuff I typed into a file.

It is really cool stuff.

Lots and lots of fun to have in here.

from sys import argv

script, filename=argv

txt=open(filename)

print "Here is your file %r:" %filename

print txt.read()

print "type the filename again:"

filename_again=raw_input(">")    # raw_input后面若为显示的内容，要加上引号！！！

txt_again=open(filename_again)

print txt_again.read()

$ python ex15.py ex15_sample.txt
Here's your file 'ex15_sample.txt':
This is stuff I typed into a file.
It is really cool stuff.
Lots and lots of fun to have in here.


Type the filename again:
>  ex15_sample.txt
This is stuff I typed into a file.
It is really cool stuff.
Lots and lots of fun to have in here.

最后需要用close()关闭文件