Re: [ZODB-Dev] grab zodb dict keys by search term
On Wed, 11 Dec 2013 12:27:19 +0200, Tamer Higazi tamerito...@arcor.de wrote : If i would have 100.000 - 500.000 entries, where 150 would match, I don't want to go over those completely. So, if there is a pythonic way to get it solved on a performant way, or a ZODB way as well that would be wondefull. BTrees have a very nice API, which allow scanning only a subset of keys by providing min and max boundaries: for key, value in some_btree.items( min='aa', max='b', excludemax=True): # Do stuff should do what you want. http://pythonhosted.org/BTrees/ -- Vincent Pelletier ERP5 - open source ERP/CRM for flexible enterprises ___ For more information about ZODB, see http://zodb.org/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] grab zodb dict keys by search term
you might be interested in https://pypi.python.org/pypi/souper/ which addresses this kind of problem hth Jens On 2013-12-10 23:46, Tamer Higazi wrote: Hi people! I am working a lot with IOB and OOB Trees as well with PersistentDict and PersistentList to store my Data in ZODB. I want to ask if there is a way to grab data from a dataset by search time. I know only the SQL way: select lower(COL1) from table1 where COL1 LIKE 'aa%' so usually I want to get the entryies only that starts with 'aa' do I have to iterate the entire dict with an interator or are there builtin functions that could accomplish those tasks for me ?! I would kindly thank you Tamer ___ For more information about ZODB, see http://zodb.org/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev -- Klein Partner KG, member of BlueDynamics Alliance ___ For more information about ZODB, see http://zodb.org/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
