Searched for this the other day. Came up empty. Clearly, didn't search hard enough.

Automatically Generated Python Code from an UML diagram? So far, there are three separate answers listing a total of five separate products.

I really want to annotate the UML with docstrings. If that was supported, it …

See Python XML parsing and Parsing simple XML files in python using etree.

Originally, I used SAX -- but built DOM objects with it. I moved from application-specific DOM's to generic DOM's.

Then I switched to the miniDOM parser. It gave me structures I could walk with a pleasant Visitor design …

I've cataloged a third specific case of fundamental failures to understand polymorphism. The first two I've seen a fair number of times. The third seems to be more rare.

1. "How do I determine which subclass an object has?" The Identification problem.

2. "How do I morph an object to …

One of the Agile practices is Continuous Integration.

Fowler suggests that everyone commits every day. In Elssamadisy's book includes specific advice on why a daily check-in helps.

Some folks call this the "Don't Break the Build" practice.

But what does that mean for Python where there is no build? And …

We have a design, we have code and we have tests that all pass.

Tuesday, we got some new input data that just wouldn't work.

What -- if anything -- went wrong?

Agile is as Agile Does

We're following an Agile approach for several reasons.

1. I'm too lazy to draw up an …

I got a bug report (back in April) about an exercise in Building Skills in Python. It was a change from 2.2 that I never validated in 2.5. Thanks to my readers for responding with questions and complaints.

I've finally updated and posted the revisions.

Further, after some …

Here's an amazing Stack Overflow question.

The follow-up conversation is great stuff.

The question shows two versions of approximately the same processing. Python is faster than Java. That's unexpected.

Java has static compilation and the hot-spot translation to machine code. Apparently, Python has some optimizations that are just as valuable …

A resume is a slippery thing -- a package of semi-structured data.

It has a kind of database-like feel to it, but there are so many exceptions and special cases that the database never works out quite the way you wanted.

For example, I've got -- essentially -- one employer over the past …

For a while, I generated documentation with Cheetah. I wrote bodies as a fragment of HTML and used Cheetah to wrap those bodies in standard templates with navigation and branding. To write my books, I learned DocBook markup and used DocBook XSL tools to create HTML and PDF versions of …

This is -- partially -- about the object-relational impedance mismatch.

But it's also about the parallel concepts between objects and relations. We'll use Python as our object model.

First, the obvious.

A SQL table is a list of rows. A row is a dictionary that maps a column name to a column …