Re: Hashed lookups for tabular data

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed2a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path	<jcasale@activenetwerx.com>
X-Original-To	python-list@python.org
Delivered-To	python-list@mail.python.org
X-Spam-Status	OK 0.013
X-Spam-Evidence	'H': 0.97; 'S': 0.00; 'sql.': 0.07; 'indexes': 0.09; 'sake': 0.09; 'changes': 0.15; 'in-memory': 0.16; 'received:172.18.0': 0.16; 'subject:tabular': 0.16; 'thanks,': 0.17; 'code.': 0.18; 'hey': 0.18; 'fit': 0.20; 'import': 0.22; 'to:name:python-list@python.org': 0.22; 'query': 0.26; 'switch': 0.26; 'header:In-Reply-To:1': 0.27; 'to:2**1': 0.27; 'getting': 0.31; 'skip:s 30': 0.35; 'add': 0.35; 'interface,': 0.36; 'subject:data': 0.36; "i'll": 0.36; 'effort': 0.37; 'too': 0.37; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:unknown': 0.61; 'simply': 0.61; 'take,': 0.84
X-Cloudmark-SP-Filtered	true
X-Cloudmark-SP-Result	v=1.1 cv=vC3pk2euBDNChG//pvWvL3ooOWecHx7HOhb0No4pI08= c=1 sm=1 a=P90J6pEA2ccA:10 a=BLceEmwcHowA:10 a=8nJEP1OIZ-IA:10 a=xqWC_Br6kY4A:10 a=g3mLq75WYuDrh3Lt0JSDww==:17 a=KA1GpDI4f_uywdpWFR4A:9 a=wPNLvfGTeEIA:10 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117
X-Spam-Checker-Version	SpamAssassin 3.3.2 (2011-06-06) on mail.activenetwerx.com
X-Spam-Level
X-Spam-Status	No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00, T_RP_MATCHES_RCVD autolearn=ham version=3.3.2
From	"Joseph L. Casale" <jcasale@activenetwerx.com>
To	Kushal Kumaran <kushal@locationd.net>, "python-list@python.org" <python-list@python.org>
Subject	Re: Hashed lookups for tabular data
Thread-Topic	Hashed lookups for tabular data
Thread-Index	AdAz8ITsOlDb5rdsT/6XGbGmQKKOvAAPhuYA//+35wGAABmpDoAABQco
Date	Mon, 19 Jan 2015 18:59:49 +0000
References	<84c6e1d5671842038e81994478fb5476@exch.activenetwerx.com> <CAPTjJmr1YXTXGi+YE0yjUxgdoy2iOWDq_th4u6ghiQ+QOouNvg@mail.gmail.com> <8761c2k6m8.fsf@mercury.locationd.net>
In-Reply-To	<8761c2k6m8.fsf@mercury.locationd.net>
Accept-Language	en-US
Content-Language	en-US
X-MS-Has-Attach
X-MS-TNEF-Correlator
x-ms-exchange-transport-fromentityheader	Hosted
x-originating-ip	[172.18.0.4]
Content-Type	text/plain; charset="iso-8859-1"
Content-Transfer-Encoding	quoted-printable
MIME-Version	1.0
X-BeenThere	python-list@python.org
X-Mailman-Version	2.1.15
Precedence	list
List-Id	General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe	<https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive	<http://mail.python.org/pipermail/python-list/>
List-Post	<mailto:python-list@python.org>
List-Help	<mailto:python-list-request@python.org?subject=help>
List-Subscribe	<https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups	comp.lang.python
Message-ID	<mailman.17861.1421693993.18130.python-list@python.org> (permalink)
Lines	18
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1421693993 news.xs4all.nl 2938 [2001:888:2000:d::a6]:55062
X-Complaints-To	abuse@xs4all.nl
Xref	csiph.com comp.lang.python:84026

Show key headers only | View raw

> If you want an sql-like interface, you can simply create an in-memory
> sqlite3 database.
> 
>  import sqlite3
>  db = sqlite3.Connection(':memory:')
> 
> You can create indexes as you need, and query using SQL.  Later, if you
> find the data getting too big to fit in memory, you can switch to using
> an on-disk database instead without significant changes to the code.

Hey kushal,
For the effort it would take, I'll add an implementation using this this
when I start profiling for the sake of curiosity.

Thanks,
jlc

Back to comp.lang.python | Previous | Next | Find similar | Unroll thread

Thread

Re: Hashed lookups for tabular data "Joseph L. Casale" <jcasale@activenetwerx.com> - 2015-01-19 18:59 +0000

csiph-web