Back in 1994 my circle of high school friends spent a lot of time sitting around talking (there were no cell phones) and for about a week we were all playing one handed solitaire. In suburban St. Louis we called it idiot's delight solitaire (which turns out to be an entirely different game), because there is absolutely no human input after the shuffle. As soon as you've started playing it's already determined whether you've won -- you just spend five minutes learning if you did.

An 11 year old in our house needed to do a book report for school in the form of a board game and selected a gamebook, apparently the generic name for the trademarked Choose Your Own Adventure books. The non-linear narrative made the choice of board layout easy -- just use the graph of pages-transitions ("Turn to page 110").

The graphviz library is always my first choice when I want to visualize nodes and edges, and the python graphviz module provides a convenient way to get data into a renderable graph structure.

Home security system projects are fun because everything about them screams "1980s legacy hardware design". Nowhere else in the modern tech landscape does one program by typing in a three digit memory address and then entering byte values on a numeric keypad. There's no enter-key -- you fill the memory address. There's no display -- just eight LEDs that will show you a byte at a time, and you hope it's the address you think it is. Arduinos and the like are great for hobby fun, but these are real working systems whose core configuration you enter byte by byte.

I spent a few hours trying to get the Jenkins Git & Github plugins to:

• run pylint on all remote branch heads that:
  • arent' too old
  • haven't already had pylint run on them
• send the repo status back to GitHub

I'm sure it's possible, but the Jenkins Git plugin doesn't like a single build to operate on multiple revisions. The repo statuses weren't posting, the wrong branches were getting built, and it was easier to write a quick script.

Back in 2008 I wote an extension for Mercurial to render activity charts like this one:

Yesterday I finally got around to updating it for modern Mercurial builds, including 2.1. It's posted on bitbucket and has a page on the Mercurial wiki. It uses pygooglechart as a wrapper around the excellent Google image chart API.

I really like the google image charts becuse the entire image is encapsulated as a URL, which means they work great with command line tools. A script can output a URL, my terminal can make it a link, and I can bring it up in a browser window w/o ever really using a GUI tool at all.

The Python logging module has some nice built-in LogHandlers that do network IO, but I couldn't square with having HTTP POSTs and SMTP sends in web response threads. I didn't find an asynchronous logging wrapper, so I wrote a decorator of sorts using the really nifty monkey patching availble in python:

def patchAsyncEmit(handler):
    base_emit = handler.emit
    queue = Queue.Queue()
    def loop():
        while True:
            record = queue.get(True) # blocks
            try :
                base_emit(record)
            except: # not much you can do when your logger is broken
                print sys.exc_info(
    thread = threading.Thread(target=loop)
    thread.daemon = True
    thread.start(
    def asyncEmit(record):
        queue.put(record)
    handler.emit = asyncEmit
    return handler

In a more traditional OO language I'd do that with extension or a dynamic proxy, and in Scala I'd do it as a trait, but this saved me having to write delegates for all the other methods in LogHandler.

I'm thus far thrilled with blohg as a blogging platform. I've got a large post I'm finishing up now with quite a few snippets of source code in two different programming languages. I was hoping to use the excellent SyntaxHighlighter javascript library to prettify those snippets, and was surprised to find that docutils reStructuredText doesn't yet do that (though some other implementations do).

Fortunately, adding new rendering directives to reStructuredText is incredibly easy. I was able to add support for a .. code mode with just this little bit of Python: