how to download special range content with requests in python?

[水静流深]

url='http://debian.cites.illinois.edu/pub/debian-cd/7.6.0/amd64/iso-cd/debian-7.6.0-amd64-CD-1.iso'
 import requests
 r = requests.get(url).read(0,1000)  ‍

why i can not download special range(from 0 to 10000)  content with requests  in python‍?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20140723/2c78b06e/attachment.html>