[mod_python] No module named _md5

I have reduced my code to the following test case:

from hashlib import md5

def handler(req):
    req.content_type = "text/plain"
    req.write(md5("hello").hexdigest())

which produces the following traceback:

Mod_python error: "PythonHandler handler"
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/mod_python/apache.py", line 287, in
HandlerDispatch
    log=debug)
  File "/usr/lib/python2.5/site-packages/mod_python/apache.py", line 464, in
import_module
    module = imp.load_module(mname, f, p, d)
  File "/var/www/indiegigs/src/handler.py", line 3, in
    from hashlib import md5
  File "/usr/lib64/python2.5/hashlib.py", line 104, in
    md5 = __get_builtin_constructor('md5')
  File "/usr/lib64/python2.5/hashlib.py", line 31, in
__get_builtin_constructor
    import _md5
ImportError: No module named _md5


Regards,
Andrew
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