Q: operation not permitted error...

[hwan-jo yu]

Hi,

When I try to call keys() function of a shelve, it returns the following 
error.

Traceback (most recent call last):
  File "size.py", line 6, in ?
    k = s.keys()
  File "/usr/local/lib/python2.0/shelve.py", line 55, in keys
    return self.dict.keys()
bsddb.error: (1, 'Operation not permitted')


### source code ###
import shelve
s = shelve.open("aaa")  # 'aaa' is a shelve data file created before
k = s.keys()
print len(k)

What caused this error ?
Thanks