How to generate a fixed-length hash based on current date and time in Python?

Question

I want to generate a fixed-length (say 10 characters) hash based on current date & time. This hash will be append to names of the uploaded files from my users. How can I do

Answer 1

Batteries included:

import hashlib
import time

hash = hashlib.sha1()
hash.update(str(time.time()))
print hash.hexdigest()
print hash.hexdigest()[:10]