On StackOverflow you can read numerous questions on "flattening" nested lists in Python.

They all have a similar form.

"How do I flatten this list [ [ 1, 2, 3 ], [ 4, 5, 6 ], ... , [ 98, 99, 100 ] ]?"

The answers include list comprehensions, itertools, and other clever variants.

[STRIKEOUT:All] Much of which is …

Upgraded a VM to Fedora 11 recently.

This -- it turns out -- comes with Python 2.6 installed.

It is, however, an incomplete build. To do anything, I had to install a some additional Python packages. Specifically, the "libraries and header files needed for Python development". Also, IIRC, the tkinter package …

See this in Boing Boing: http://www.boingboing.net/2009/09/11/hairy-type.html

They're talking about NodeBox, something I'd never heard of before.

"NodeBox is a Mac OS X application that lets you create 2D visuals (static, animated or interactive) using Python programming code and export them as a …

Check out this list of questions from Stack Overflow: [Django] join.

These are all folks trying to do joins or outer joins even though they have objects fetched through the ORM.

How does this confusion arise? Easy. Folks work with SQL as if the relational world-view is Important and Universal …

I used to rely on the TIOBE Software Programming Community Index.

Today, I learned about the langpop site. The context was following an SD Times blog posting on Haskell. But I got distracted looking at language rankings and what it means to consulting companies.

[Until corrected, I was] particularly drawn …

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 …