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Project Description
Welcome, please read through this brief documentation.

All the sqldict examples below will use an sqlalchemy engine e.
Certain database engines will need certain back-end modules
which in most cases are available as packages in your *nix
distribution or as .exe installers, see INSTALLATION* below.

Lets create the engine object:

>>> from sqlalchemy import *
>>> dburi = 'mysql://user:pass@localhost/sqldict'
>>> e = create_engine(dburi)

Create database tables, t1 and t2, to hold dicts d1 and d2:

>>> d1 = sqldict(e, "t1", create=1)
>>> d2 = sqldict(e, "t2", create=1, keytype=String(50), valtype=Integer)

An sqldict() support all or most common dict operations depending on
which sqldict extensions are chosen.

This is a selection of some useful sqldict instantiation args:

echo - print all executed sql queries to stdout (bool)
create - create database table (bool)
sort - 0=no sort, 1=keys, 2=values
serialize - transparent pickling for non-String type values
assigned to String-type columns (bool)
getrow - get entire row instead of just val (bool)
keycol - name of key column
valcol - name of val column
keytype - sqlalchemy column type for key
valtype - sqlalchemy column type for val

Actions taken such as setting/getting items result in logically
corresponding SQL statements. Some examples are:

__getitem__() - SELECT keycol FROM tablename WHERE valcol=%(val)s
iter*() - iterate over result-set from a select statement
keys|values() - returns list(iter*())
__del__() - DELETE FROM..
__setitem__() - UPDATE.., INSERT..



>>> contents = {"asd":123}
>>> d1.update(contents)
>>> d2.update(contents)
>>> assert d1["asd"] == "123"
>>> assert d2["asd"] == 123
>>> d1.drop()
>>> d2.drop()

>>> assert e.execute("create table asd (i integer, s varchar(50))")
>>> assert e.execute("insert into asd values (42, 'gubbe')")
>>> assert e.execute("insert into asd values (99, 'hatt')")
>>> d3 = sqldict(e, "asd", keycol="s", valcol="i")
>>> d4 = sqldict(e, "asd", keycol="i", valcol="s")
>>> #d5 = sqldict(e, "asd", keycol="s", valgetter=lambda r:r)
>>> assert d3["gubbe"] == 42
>>> assert d4[42] == "gubbe"
>>> assert e.execute("drop table asd")
>>>
>>> #assert d5["gubbe"]["i"] == 42

broken (at least mysql) when combining keytype and serialize,
it tries to serialize 42.
FIXME: d[int] = Integer or d[Integer]
>>> from sqlalchemy import *
>>> d = sqldict(e, "laarge", create=1, serialize=1, keytype=Integer)
>>> d[42] = "galning"

INSTALLATION INSTRUCTIONS

I use debian, so I do the following:
$ sudo apt-get install python-setuptools python-mysqldb
$ easy_install sqlalchemy
$ easy_install sqldict
Release History

Release History

0.5.2

This version

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0.5.0

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0.3.1

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0.3.0

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0.2.0

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0.1.1

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0.1.0

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
sqldict-0.5.2.tar.gz (10.2 kB) Copy SHA256 Checksum SHA256 Source Apr 20, 2010

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