It’ll Come Out in the Wash

After reading this fine summary of the history of Python 3 by Nick Coghlan I was inspired to update as many of my half finished projects and miscellaneous scripts as possible. Then I looked up and I had lost several hours of my life. To save random internet strangers from the same pain as I experienced here is a catalogue of problems and how I solved them.

tl;dr – Python 3.3 on Ubuntu 12. (more...)

SacredPy seeking collaborators

I'm looking for collaborators who want to build web programming experience on an interesting project...

During my job search, I was contacted by Kai Schraml, a seminary graduate who wants to scratch an itch. Seminarians have a serious need to discuss, debate, and seek consensus on the translations of (more...)

Presentation links

I have just had a VERY. Busy. Week. (In a good way!) I've promised the world many talk materials, so:

As for Postgres Open, I absolutely loved (more...)

I’m not available

I'm happy to say that I'll shortly be starting a new position as a PostgreSQL DBA and Python developer for Zoro Tools!

We software types seem to have hardware envy sometimes. We have "builds" and "engines" and "forges" and "factory functions". But as it turns out, the "Tools" in "Zoro (more...)

IPython at Ohio LinuxFest 2013

Are you signed up yet for Ohio LinuxFest on Sep. 13-15? I'll be there to present

IPython for non-Pythonistas

Break out of your (bash) shell! IPython and the IPython Notebook have swept over the Python programming community, but they're not just for Python programmers - they make for high-powered shell (more...)

Python Workshop for Women Indy #2 and CMH #2 coming up!

The Midwest Python Workshop for women and their friends is back! We've got new workshops scheduled, ready to take new batches of students:

Indianapolis Python Workshop, Sep. 27-28, 2013; sponsored by Six Feet Up and hosted at Launch Fishers

Columbus Python Workshop, Oct. 18-19, 2013; sponsored by LeadingEdje (more...)

I’m available

I'm available for hire! If you need a database expert with lots of programming skill, or a Python programmer with deep database experience, please check out:

Resume / portfolio

But: you must be telecommute-friendly, or in the Dayton area. I'm sorry, but I'm not available to relocate.

IPython %helloworld extension

At Monday's after-PyOhio sprint, I changed ipython-sql from an IPython Plugin to an Extension; this makes it compatible with IPython 1.0. Fortunately, this was really easy; mostly I just deleted Plugin code I didn't understand anyway.

But I do feel like "Writing Extensions" docs are lacking a "Hello World" (more...)

PyOhio Stone Soup

Loved PyOhio once again! Thanks so much to everybody who came, participated, and made it happen! I get such a rush of joy from seeing the Ohio Union fill up with happy Pythonistas.

PyOhio has been a classic case of the Stone Soup story. When we started planning the first (more...)

The IPython Notebook Revolution

Among the many great talks coming to PyOhio at the end of this month:
The IPython Notebook Revolution Catherine Devlin If you think of IPython as simply an enhanced version of the live Python prompt, you are in need of re-education. No matter what you do with Python, applying the (more...)

Easy HTML output in IPython Notebook

If any object has a _repr_html_ method, the IPython Notebook will use it to render HTML output. It's really easy to make a simple class that permits general dynamic HTML-rich output with Markdown. Markdown is a superset of HTML, so HTML in your output string will work, too.

import markdown

ipython-sql bind variables

Thanks to Mike Wilson, ipython-sql now supports bind variables!

In [12]: name = 'Countess'

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

Review of Learning IPython for Interactive Computing and Data Visualization

valuable but traditional

May 25, 2013 by Catherine Devlinphoto of 'Learning IPython for Interactive Computing and Data Visualization' 4 stars (of 5)

Packt Publishing recently asked if I could review their new title, Learning IPython for Interactive Computing and Data Visualization. (I got the e-book free for doing the review, (more...)

cannot import name MAXREPEAT

When I upgraded from Xubuntu 12.10 to 13.04 today, all my existing Python virtualenvs broke! Fortunately, they're just virtualenvs and easy to replace (that's kind of the point). But don't panic if you start seeing these.

$ ipython
Traceback (most recent call last):
File "/home/catherine/ve/e2/bin/ipython", line 5, in

Speak at PyOhio

Have you responded yet to PyOhio's Call For Proposals (due date: June 1)? You should. Here's why.

Why you should speak at PyOhio

  • We need you. We have a great group of people who contribute talks, but we don't ever want that group to become a stagnant pool - we (more...)
  • ipython-sql for multi-database comparisons

    For my newest ipython-sql trick, I needed to compare some queries run across different databases. How hard would it be to get side-by-side results into tidy IPython Notebook output?

    Not hard at all, it turns out, if you're willing to violate basic principles of human decency.

    That's an itty-bitty image, (more...)

    Linux Installfest, Dayton, Sat April 13

    Dayton folks - are you coming to the Dayton Linux User Group's Installfest tomorrow?

    The main point of our Installfests is to get everyone together for mutual help setting up and configuring computers and programs. But we like to throw in some educational talks, too, and I volunteered to give (more...)

    Living in the Future

    On my morning commute today I realised that I am actually living in the future. I remember when I got involved in the PythonCard project 10 years ago one of the major questions on the mailing list was why we were building a GUI toolkit when the future was the web. It wasn’t true then but I think that it is now.

    Why do I think we have moved now? It is in large part thanks to a book I have started reading called Python for Data Analysis. I have a copy of the book in ePub format and wanted (more...)

    The Full Monty – from Ruby to Python n00bie

    Ruby developers are a pretty spoilt bunch these days. The community has overall done a great job of rolling many of the advances in modern development practice into the tools and conventions we unconsciously put to work every day.
    Now I wonder what life is like in the Python community? Like many Rubyists, I've played around with Python and Jython on and off. But nothing serious. And although you could get into a pedantic syntax war, I suspect for the most part the Python and Ruby communities don't overlap simply because once you dive into one camp, the only real (more...)

    Separate docs for MySQL Connectors

    The MySQL documentation section has always had this Topic Guides page containing links to the docs for the various MySQL Connectors -- the official database drivers for various languages and programming technologies. That is the most convenient way to get the information for each Connector in PDF form, rather than downloading the entire Ref Man PDF. For HTML, it was more of a shortcut, because