Shelve and Linux

[James Park]

I'm having a bit of problem using the shelve module on linux

Here's a simple test script:
---------------------
#!/usr/bin/env python

import shelve
 
d = shelve.open("test.dbm", "c")
d["test"] = "haha"
d.close()
 
d= shelve.open("test.dbm")
print d["test"]
d.close()
-----------------------

On NT, it works fine.
on RedHat Linux 6.0 (2.2.7), it gives this error message:

Traceback (innermost last):
  File "./test.py", line 11, in ?
    d= shelve.open("test.dbm")
  File "/usr/lib/python1.5/shelve.py", line 152, in open
    return DbfilenameShelf(filename, flag)
  File "/usr/lib/python1.5/shelve.py", line 142, in __init__
    Shelf.__init__(self, anydbm.open(filename, flag))
  File "/usr/lib/python1.5/anydbm.py", line 83, in open
    raise error, "db type could not be determined"
anydbm.error: db type could not be determined


is this a problem with the way python is configured on my system or
something else?

thanks
jp