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ipython-sql 0.2.3

RDBMS access via IPython

Latest Version: 0.3.1

===========
ipython-sql
===========

:Author: Catherine Devlin, http://catherinedevlin.blogspot.com

Introduces a %sql (or %%sql) magic.

Connect to a database, using SQLAlchemy connect strings, then issue SQL
commands within IPython or IPython Notebook.

.. image:: https://raw.github.com/catherinedevlin/ipython-sql/master/examples/writers.png
   :width: 600px
   :alt: screenshot of ipython-sql in the Notebook

Examples::

    In [1]: %load_ext sql

    In [2]: %%sql postgresql://will:longliveliz@localhost/shakes
       ...: select * from character
       ...: where abbrev = 'ALICE'
       ...:
    Out[2]: [(u'Alice', u'Alice', u'ALICE', u'a lady attending on Princess Katherine', 22)]

    In [3]: result = _

    In [4]: print(result)
    charid   charname   abbrev                description                 speechcount
    =================================================================================
    Alice    Alice      ALICE    a lady attending on Princess Katherine   22

    In [4]: result.keys
    Out[5]: [u'charid', u'charname', u'abbrev', u'description', u'speechcount']

    In [6]: result[0][0]
    Out[6]: u'Alice'

    In [7]: result[0].description
    Out[7]: u'a lady attending on Princess Katherine'

After the first connection, connect info can be omitted::

    In [8]: %sql select count(*) from work
    Out[8]: [(43L,)]

Connections to multiple databases can be maintained.  You can refer to
an existing connection by username@database::

    In [9]: %%sql will@shakes
       ...: select charname, speechcount from character
       ...: where  speechcount = (select max(speechcount)
       ...:                       from character);
       ...:
    Out[9]: [(u'Poet', 733)]

    In [10]: print(_)
    charname   speechcount
    ======================
    Poet       733

You may use multiple SQL statements inside a single cell, but you will
only see any query results from the last of them, so this really only
makes sense for statements with no output::

    In [11]: %%sql sqlite://
       ....: CREATE TABLE writer (first_name, last_name, year_of_death);
       ....: INSERT INTO writer VALUES ('William', 'Shakespeare', 1616);
       ....: INSERT INTO writer VALUES ('Bertold', 'Brecht', 1956);
       ....:
    Out[11]: []


Bind variables (bind parameters) can be used in the "named" (:x) style.
The variable names used should be defined in the local namespace::

    In [12]: name = 'Countess'

    In [13]: %sql select description from character where charname = :name
    Out[13]: [(u'mother to Bertram',)]

Connecting
----------

Connection strings are `SQLAlchemy`_ standard.

Some example connection strings::

    mysql+pymysql://scott:tiger@localhost/foo
    oracle://scott:tiger@127.0.0.1:1521/sidname
    sqlite://
    sqlite:///foo.db

.. _SQLAlchemy: http://docs.sqlalchemy.org/en/latest/core/engines.html#database-urls

Note that ``mysql`` and ``mysql+pymysql`` connections (and perhaps others)
don't read your client character set information from .my.cnf.  You need
to specify it in the connection string::

    mysql+pymysql://scott:tiger@localhost/foo?charset=utf8

Configuration
-------------

Query results are loaded as lists, so very large result sets may use up
your system's memory and/or hang your browser.  There is no autolimit
by default.

::

    In [2]: %config SqlMagic
    SqlMagic options
    --------------
    SqlMagic.autolimit=<Int>
        Current: 0
        Automatically limit the size of the returned result sets
    SqlMagic.short_errors=<Bool>
        Current: True
        Don't display the full traceback on SQL Programming Error
    SqlMagic.style=<Unicode>
        Current: 'DEFAULT'
        Set the table printing style to any of prettytable's defined styles
        (currently DEFAULT, MSWORD_FRIENDLY, PLAIN_COLUMNS, RANDOM)

Pandas
------

If you have installed ``pandas``, you can use a result set's
``.DataFrame()`` method::

    In [3]: result = %sql SELECT * FROM character WHERE speechcount > 25

    In [4]: dataframe = result.DataFrame()

.. _Pandas: http://pandas.pydata.org/

Graphing
--------

If you have installed ``matplotlib``, you can use a result set's
``.plot()``, ``.pie()``, and ``.bar()`` methods for quick plotting::

    In[5]: result = %sql SELECT title, totalwords FROM work WHERE genretype = 'c'

    In[6]: %matplotlib inline

    In[7]: result.pie()

.. image:: https://raw.github.com/catherinedevlin/ipython-sql/master/examples/wordcount.png
   :alt: pie chart of word count of Shakespeare's comedies


Installing
----------

Install the lastest release with:

    pip install ipython-sql

or download from https://github.com/catherinedevlin/ipython-sql and:

    cd ipython-sql
    sudo python setup.py install

Development
-----------

https://github.com/catherinedevlin/ipython-sql

Credits
-------

- Matthias Bussonnier for help with configuration
- `Distribute`_
- `Buildout`_
- `modern-package-template`_

.. _Buildout: http://www.buildout.org/
.. _Distribute: http://pypi.python.org/pypi/distribute
.. _`modern-package-template`: http://pypi.python.org/pypi/modern-package-template



News
====

0.1
---

*Release date: 21-Mar-2013*

* Initial release

0.1.1
-----

*Release date: 29-Mar-2013*

* Release to PyPI

* Results returned as lists

* print(_) to get table form in text console

* set autolimit and text wrap in configuration


0.1.2
-----

*Release date: 29-Mar-2013*

* Python 3 compatibility

* use prettyprint package

* allow multiple SQL per cell

0.2.0
-----

*Release date: 30-May-2013*

* Accept bind variables (Thanks Mike Wilson!)

0.2.1
-----

*Release date: 15-June-2013*

* Recognize socket connection strings

* Bugfix - issue 4 (remember existing connections by case)

0.2.2
-----

*Release date: 30-July-2013*

Converted from an IPython Plugin to an Extension for 1.0 compatibility

0.2.2.1
-------

*Release date: 01-Aug-2013*

Deleted Plugin import left behind in 0.2.2

0.2.3
-----

*Release date: 20-Sep-2013*

* Contributions from Olivier Le Thanh Duong:

  - SQL errors reported without internal IPython error stack

  - Proper handling of configuration

* Added .DataFrame(), .pie(), .plot(), and .bar() methods to
result sets
 
File Type Py Version Uploaded on Size
ipython-sql-0.2.3.tar.gz (md5) Source 2013-09-21 8KB
ipython_sql-0.2.3-py2.7.egg (md5) Python Egg 2.7 2013-09-21 16KB
ipython_sql-0.2.3-py3.3.egg (md5) Python Egg 3.3 2013-09-21 17KB
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