Hey, where is Python.h ???

I installed the Postgres 7.3 beta version yesterday with no problem. Today
I'm trying to install the python module for Postgres but failing miserably.
I get the following error:

pgmodule.c:29:20: Python.h: No such file or directory

And, I can't find Python.h anywhere. This is Redhat Linux 7.3.

Anybody know where, oh where Python.h might be? Or is there a reasonable
substitute? I can change the #include in pgmodule.c, I guess, if I knew what
to put in there.

Thanks,
--Walt Weaver
  Bozeman, Montana