null bytes in re pattern - difference between 1.5.2 and 2.0?

[Skip Montanaro]

I want to delete control characters from some strings.  Accordingly, I
tried:

    name = re.sub("[\000-\037\177]", "", name)

This works in Python 2.0 but not in 1.5.2.  In 1.5.2 I find I need to use
raw strings:

    name = re.sub(r"[\000-\037\177]", "", name)

Accordingly, using raw strings in 2.0 fails.  Is there some form that will
work both in 1.5.2 and 2.0?

Is this a change I should have expected?  I assume it has something to do
with Unicode support in 2.0.

-- 
Skip Montanaro (skip at mojam.com)
Support the Mojam.com Affiliates Program: http://www.mojam.com/affl/
(847)971-7098