"re" vs "sre"?

[Lawrence D'Oliveiro]

I learned about Python regular expressions from the Web documentation
<http://docs.python.org/lib/lib.html>. This describes a module named "re".
Then I saw some code written by a colleague, and he was using a module
named "sre". I checked my Python 2.4.3 installation, and sure enough, I
have a module named "sre" as well as "re". Curious, I fired up an
interactive Python session, and looked to see what the docstrings were for
these modules. And for the "re" module, the help says:

    re - Minimal "re" compatibility wrapper.  See "sre" for documentation.

and "sre" seems to have the more complete set of docstrings.

So which one should we be using?