HI Vajrasky,
Django itself is licensed under the BSD license. This license allows you to produce derivative works, provided you comply with the terms of the BSD license. That means you can apply whatever *additional* terms you want, but the original copyright notice and attribution must also be provided with the code.
In the case of a snippet like this one, your best bet is to add a comment in the code that reads something like:
# This is derived from code provided by the Django Project.
# Original code is licensed under the terms of the BSD license.
Yours,
Russ Magee %-)