[Python-Dev] why isn't SRE a shared module?

[Fredrik Lundh]

from Modules/Setup.in:

    # The modules listed here can't be built as shared libraries for
    # various reasons; therefore they are listed here instead of in the
    # normal order.

    # Some modules that are normally always on:

    regex regexmodule.c regexpr.c # Regular expressions, GNU Emacs style
    pcre pcremodule.c pypcre.c # Regular expressions, Perl style (for =
re.py)
    posix posixmodule.c  # posix (UNIX) system calls
    signal signalmodule.c  # signal(2)
    _sre _sre.c   # Fredrik Lundh's new regular expressions

possibly a stupid question, but what exactly is SRE doing
in there?

</F>