[Python-bugs-list] [ python-Bugs-491888 ] whichdb lies about db type

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Bugs item #491888, was opened at 2001-12-11 19:22
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Category: Python Library
Group: Python 2.1.1
Status: Open
Resolution: None
Priority: 5
Submitted By: Richard Jones (richard)
Assigned to: Nobody/Anonymous (nobody)
Summary: whichdb lies about db type

Initial Comment:
>>> import dbm
>>> d = dbm.open('foo', 'n')
>>> d['a'] = 'b'
>>> d.close()
>>> import whichdb
>>> whichdb.whichdb('foo.db')
'dbhash'

I'm currently testing for the existence of "foo.db" 
instead of "foo" and hard-code my routines to use dbm 
if there is a "foo.db" file (since all other db 
modules that I've tested do no append ".db")

Might it also be possible to have anydbm perform a 
whichdb check in its open function, so that older 
databases are usable with newer, more feature-full 
installations that might include "better" dbm 
backends?



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>Comment By: Guido van Rossum (gvanrossum)
Date: 2001-12-11 20:28

Message:
Logged In: YES 
user_id=6380

Hm. anydmb *does* use whichdb. The problem seems to be that
the dbm file really *does* look like a BSD hash -- the Unix
file(1) command has the same problem.

But I'm not sure I understand your question. Do you have a
particular patch in mind?

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