Archive for August, 2012

What I’ve Been Up To

Sunday, August 5th, 2012

Historically, I post fairly regularly on this blog, but I haven’t been lately. It’s not for lack of anything to write about, but rather a lack of time to devote to blogging. I want to post at greater length about some of the stuff I’ve been doing, and I have several draft posts, but I wanted to list what I’ve been up to for two reasons:

  1. I use my blog as a sort of informal record of what I accomplished over the course of the year, hurdles I ran into, etc. I also sometimes use it to start a dialog about something, or to ‘think out loud’ about ideas. So it’s partially for my own reference.
  2. Someone might actually be interested in something I’m doing and want to pitch in, fork a repo, point me at an existing tool I’m reinventing, give me advice, or actually make use of something I’ve done or something I’ve learned and can share.

PyCon 2013

I’m participating again for the third year in the Program Committee and anywhere else I can help out (time permitting) with the organization of PyCon. It’s historically been a fantastic and really rewarding experience that I highly (and sometimes loudly) recommend to anyone who will listen. Some day I want to post at greater length about some actual instances where being really engaged in the community has been a win in real, practical ways. For now, you’ll have to take my word for it. It’s awesome.

I also hope to submit a talk for PyCon 2013. Anyone considering doing this should know a couple of things about it:

  1. Even though I participate in the Program Committee, which is a completely volunteer committee that takes on the somewhat grueling process of selecting the talks, tutorials, and poster sessions, it’s pretty much unrelated to my chances of having my talk accepted. In other words, submitting a talk is as daunting for me as it is for anyone. Maybe more so.
  2. Giving a talk was a really rewarding experience, and I recommend to anyone to give it a shot.

I just published a really long post about submitting a talk to PyCon. It’s full of completely unsolicited advice and subjective opinions about the do’s and don’ts of talk submission, based on my experiences as both a submitter of proposals and a member of the Program Committee, which is the committee that selects the talks.

Python Cookbook

Dave Beazley and I are really rolling with the next edition of the Python Cookbook, which will cover Python 3 *only*. We had some initial drama with it, but the good news is that I feel that Dave and I have shared a common vision for the book since just about day one, and that shared vision hasn’t changed, and O’Reilly hasn’t forced our hand to change it, which means the book should be a really good reflection of that vision when it’s actually released. I should note, however, that the next edition will represent a pretty dramatic departure from the form and function of previous versions. I’m excited for everyone to see it, but that’s going to have to wait for a bit. It’s still early to talk about an exact release date – I won’t know that for sure until the fall, but I would expect it to be at PyCon 2013.


I’ve blogged a bit about pyrabbit before: it’s a Python client for talking to RabbitMQ’s RESTful HTTP Management API. So, it’s not for building applications that do message passing with AMQP — it’d be more for monitoring, polling queue depths, etc., or if you wanted to build your own version of the browser-based management interface to RabbitMQ.

Pyrabbit is actually being used. Last I looked, kombu was actually using it, and if memory serves, kombu is used in Celery, so pyrabbit is probably installed on more machines than I’m aware of at this point. I also created a little command shell program called bunnyq that will let you poke at RabbitMQ remotely without having to write any code. You can create & destroy most resources, fire off a message, retrieve messages, etc. It’s rudimentary, but it’s fine for quick, simple tests or to validate your understanding of the system given certain binding types, etc.

I have a branch wherein I port the unit tests for Pyrabbit to use a bit of a different approach, but I also need to flesh out more parts of the API and test it on more versions of RabbitMQ. If you use Pyrabbit, you should know that I also accept pull requests if they come with tests.

Stealth Mode

Well, ‘stealth’ is a strong word. I actually don’t believe much in stealth mode, so if you want to know just ask me in person. Anyway, between 2008 and 2012 I’ve been involved in startups (both bought out, by the way! East Coast FTW!) that were very product driven and very focused on execution. I was lucky enough to answer directly to the CEO of one of those companies (AddThis) and directly to the CTO of the other (myYearbook, now, which gave me a lot of access and insight into the mechanics, process, and thinking behind how a product actually comes to be. It turns out I really love certain aspects of it that aren’t even necessarily technical. I also really find the execution phase really exciting, and the rollout phase really almost overwhelmingly exciting.

I’ve found myself now with an idea that is really small and simple, but just won’t go away. It’s kind of gnawing at me, and the more I think about it, the more I think that, given what I’ve learned about product development, business-side product metrics, transforming some stories into an execution plan, etc., on top of my experience with software development, architecting for scalability, cloud services, tools/technologies for building distributed systems, etc., I could actually do this. It’s small and simple enough for me to get a prototype working on my own, and awesome enough to be an actual, viable product. So I’m doing it. I’m doing it too slowly, but I’m doing it.

By the way, the one thing I completely suck at is front end design/development. I can do it, but if I could bring on a technical co-founder of my own choosing, that person would be a front end developer who has pretty solid design chops. If you know someone, or are someone, get in touch – I’m @bkjones on Twitter, and bkjones at gmail. I’m jonesy on freenode. I’m not hard to find 🙂

In and Out of Love w/ NoSQL

I’ve recently added Riak to my toolbelt, next to CouchDB, MongoDB, and Redis (primarily). I was originally thinking that Riak would be a good fit for a project I’m working on, but have grown more uncomfortable with that notion as time has passed. The fact of the matter is that my data has relationships, and it turns out that relational databases are actually a really good fit in terms of the built-in feature set. The only place they really stink is on the operations side, but it also turns out that I have, like, several years of experience in doing that! Where I finally lost patience with NoSQL for this project was this huge contradiction that I never hear anyone ever talk about. You know the one — the one where the NoSQL crowd screams about how flexible everything is and how it really fits in with the “agile” mindset, and then in another doc in the same wiki strongly drives home the message that if you aren’t 100% sure what the needs of your app are, you should really make sure you have a grasp on that up front.

Uhh, excuse me, but if I’m iterating quickly on an app, testing in production, iterating on what works, failing fast, and designing in the direction of, and in direct response to, my customers, HOW THE HELL DO I KNOW WHAT MY APP’S NEEDS ARE?

So, what I’m starting with is what I know for sure: my data has relationships. I’m experienced enough with NoSQL solutions to understand my options for modeling them & enforcing the relationships, but when the relational aspect of the data is pretty much always staring you in the face and isn’t limited to a small subset of operations that rely on the relationships, it seems like a no-brainer to just use the relational database and spend my time writing code to implement actual features. If I find some aspect of the data that can benefit from a NoSQL solution later, well, then I’ll use it later!

Unit Testing Patterns

Most who know me know I’m kind of “into” unit testing. It’s almost like a craft unto itself, and one that I rather enjoy. I recently started a new job at AWeber Communications, where I’m working on a next-generation awesome platform to the stars 2.0 ++, and it’s all agile, TDD, kanban, and all that. It’s pretty cool. What I found in the unit tests they had when I got there were two main things:

First, the project used bare asserts, and used dingus in “mock it all!” mode. Combined, this led to tests that were mostly effective, but not very communicative in the event of failure, and they were somewhat difficult to reason about when you read them.

Second, they had a pretty cool pattern for structuring and naming that gave *running* the tests and viewing the output a more behavioral feel to them that I thought was pretty cool, and looked vaguely familiar. Later I realized it was familiar because it was similar to the very early “Introducing Behavioral Driven Development” post I saw a long time ago but never did anything with. If memory serves, that early introduction did not introduce a BDD framework like the ones popping up all over github over the past few years. It mostly relied on naming to relay the meaning, and used standard tools “behind the curtain”, and it was pretty effective.

So long story short, those tests have mostly been ported to use the mock module, and inherit from unittest2.TestCase (so, no more bare asserts). The failure output is much more useful, and I think the pattern that’s evolving around the tests now is unfinished but starting to look pretty cool! In the process, I also created a repository for unittest helpers that currently only contains a context manager that you feed a list of things to patch, and it’ll automatically patch and then unpatch things after the code under test is run. It has helped me start to think about building tests in a more consistent fashion, which means reading them is more predictable too, and hopefully we spend less time debugging them and less time introducing new developers to how they work.

PyCon Talk Proposals: All You Need to Know And More

Sunday, August 5th, 2012

Writing a talk proposal needn’t be a stressful undertaking. There are two huge factors that seem to stress people out the most about submitting a proposal, and we’re going to obliterate those right now, so here they are:

  1. It’s not always obvious how a particular section of a proposal is evaluated, so it’s not always clear how much/little should be in a given section, how detailed/not detailed it should be, etc.
  2. The evaluation and selection process is a mystery.

What Do I Put Here?

Don’t fret. Here, in detail, are all of the parts of the proposal submission form, and some insight into what’s expected to be there, and how it’s used.


Pick your title with care. While the title may not be cause for the Program Committee to throw out your proposal, you should consider the marketing aspect of speaking at a conference. For example, there are plenty of conference-goers who, in a mad dash to figure out the talk they’ll attend next, will simply skip a title that requires manual parsing on their part.

So, a couple of DOs and DON’Ts:

  • DOs

    • DO insure that your title targets the appropriate audience for your talk
    • DO keep the title as short and simple as possible
    • DO insure that the title accurately reflects what the talk is about
  • DON’Ts

    • DON’T have a vague title
    • DON’T omit key words that are crucial to understanding who the talk is for
    • DON’T create a title that’s too long or wordy

So, in short, keep the title short and clear. There’s no hard and fast rule regarding length, of course, but consider how many best-selling book titles have ever had more than, say, 7 words? I’m sure it’s happened, but it’s probably more the exception than the rule. If you feel you need a very long title in order to meet the goals of the title, describe your proposal by some friends or coworkers, and when they say “So… how to do ‘x’ with ‘y’, basically, right?”, that’s actually your title. Be gracious and thank them.

Within your concise title, you should absolutely make certain to target your audience, if your audience is a very specific subset of the overall attendee list. For example, if you’re writing a proposal about testing Django applications, and the whole talk revolves around Django’s built-in testing facilities, your title pretty much has to say “Django” in it, for two reasons:

  1. If I’m a Django user, I really want to make sure I’ve discovered all of the Django talks before I decide what I’m doing, and if your title doesn’t say “Django” in it, lots of other ones do. A reasonable person will expect to see a key word like that in the title.
  2. If I’m *not* a Django user and show up to your “Unit Testing Web Applications” talk, only to discover 10 minutes into a 25-minute talk that I’ll get nothing out of it, I’m going to really be peeved.

Finally, unless you totally and completely know what you’re doing, DO NOT use a clever title using a play on words and not a single technology-related word in the whole thing. There are several issues with doing this, but probably the most obvious ones are:

  1. You’re not your audience: just because you get the reference and think it’s a total no-brainer, it’s almost guaranteed that 95% of the attendees will not get it when quickly glancing over a list of 100 talk titles.
  2. You’re basically forcing the reader to read the abstract to see if they’ve even heard of the technology your talk is about. Don’t waste their time!


The ‘Category’ form element is a drop-down list of high-level categories like ‘Concurrency’, ‘Mobile’, and ‘Gaming’. There are lots of categories. You may pick one. So if you have an awesome talk about how you use a standard WSGI app in a distributed deployment to get better numbers from your HPC system without the fancy interconnects, you might wonder whether to put your talk into the ‘HPC’ category or the ‘Web Frameworks’ category.

In cases such as this, it can be helpful to focus on the audience to help guide your decision. What do you think your audience would look like for this talk? Well, of course there are web framework authors and users who will absolutely be interested in the talk, but there isn’t a lot of gain for them in a talk like this, is there? I mean, what are the chances that someone in the audience has always dreamed of writing web frameworks for the HPC market? On the other hand, what are the chances that an HPC administrator, developer, or site manager would love to cut costs, ease deployment, reduce maintenance overhead, etc., of their HPC system by using a totally standard non-commercial web framework? There are probably valid arguments to be made for putting it in the ‘Web Frameworks’ category, but I can’t think of any. I’d put it in the ‘HPC’ category.

One more thing to consider is the other talks at the conference, or talks that could be at the conference, or talks from past conferences. Look at last year’s program. Where does your talk fit in that mix of talks? What talks would your talk have competed with? Is there a talk from last year that is similar in scope to your proposal? What category was it listed in?
Audience Level

There’s a ton of gray area in selecting your target audience level. I’ve never liked the sort of arbitrary “Novice means less than X years experience” formulas, so I’ll do my best to lay out some rules of thumb, but ultimately, what you consider ‘Novice’, and how advanced you think your material is, is up to you. Your choices are:

  • Novice:
    • Has used but not created a decorator and context manager.
    • Has possibly never used anything in the itertools, collections, operator, and/or functools modules
    • Has used but never had any issues with the datetime, email, or urllib modules.
    • Has seen list comprehensions, but takes some time to properly parse them
  • Intermediate:
    • Has created at least a decorator, and possibly a context manager.
    • Has recently had use for the operator module (and used it) and has accepted itertools as their savior.
    • Has had a big problem with at least one of: datetime, email, or urllib.
    • There’s only a slight chance they’ve ever created or knowingly made use of metaclasses.
    • Has potentially never had to use the socket module directly for anything other than hostname lookups.
    • Can write a (non-nested) list comprehension, and does so somewhat regularly.
  • Advanced:
    • Has created both a decorator and context manager using both functions and classes.
    • Has written their own daemonization module using Stevens as their reference.
    • Has been required to understand the implications of metaclasses and/or abstract base classes in a system.
    • May be philosophically opposed to list comprehensions, metaclasses, and abstract base classes
    • Has subclassed at least one of the built-in container types

Still not sure where your talk belongs? Well, hopefully you’re torn between only two of the user categories, in which case, I say “aim high”, for a few reasons:

  1. It’s generally easier to trim a talk to target a less experienced audience than you were expecting than to grow to accommodate a more experienced audience than you were expecting.
  2. Speaking purely anecdotally and with zero statistics, and from memory, there are lots more complaints about talks being more advanced than their chosen audience level than the reverse.

The Program Committee uses the category to insure that, within any given topic space, there’s a good selection of talks for all levels of attendees. In cases where a talk might otherwise be tossed for being too similar to (and not better than) another, targeting a different audience level could potentially save the day.


Talk slots are relatively short. Your idea for a talk is awesome, but way too long. What if you could give that talk to an audience that doesn’t need the whole 15-minute introductory part of the talk? What if, when your time started ticking down, you immediately jumped into the meat of the topic? That’s what Extreme talks are for.

I’d recommend checking the ‘Extreme’ box on the submission form only if your talk *could potentially* be an Extreme talk. Why? Two reasons:

  1. The number of Extreme slots is limited, and
  2. If your talk is not accepted into an ‘Extreme’ slot, it may still be accepted as a regular talk.


There are 30-minute or 45-minute slots, or you can choose ‘No Preference’. I recommend modeling your proposal around the notion that it could be in either time slot: your ability to be flexible helps the Program Committee to be flexible as well. If your talk competes with another in the process and the only difference of any use that anyone can find is that your talk has a hard, 45-minute slot requirement, you probably have a good chance of losing that battle.

If you’d like to have a 45-minute slot, then it might help you out to build your outline for a 30-minute talk first, and then go back and add bullet points to it that are clearly marked “(If 45min slot)” or something. Alternatively, you can create the outline based on a 45-minute slot, and just use the ‘Additional Notes’ section of the form to explain how you’d alter the talk if the committee requested you do the talk in 30 minutes.


This is the description that, if your talk is accepted, people will be reading in the conference program. It needs to:

  1. Be compelling
  2. Make a promise
  3. Be 400 characters or less

Being compelling can seem very difficult, depending on your topic space. It might help to consider that you only need to be compelling to your target audience. So, while a talk called “Writing Unit Tests” is probably not compelling to the already-testing contingent at the conference, it might be totally compelling for those who aren’t but want to. Meanwhile, a talk called “Setting Up a local Automated TDD Environment in Python 3 With Zero External Dependencies” is probably pretty compelling to the already-testing crowd and not so compelling to those who aren’t yet writing tests.

Making a promise to the reader means that you’re setting an expectation in their mind that you’ll make good on some deliverable at some point in the talk. Some key phrases to use in your description to call out this promise might be “By the end of this talk, you’ll have…”, or “If you want to have a totally solid grasp of…”. The key that both of those phrases have in common is that they both imply that you’re about to tell them what they can expect to get out of the talk. It answers a question in every conference-goer’s mind when reading talk descriptions, which is “What’s in it for me?”. If you don’t answer that question in the description, it may be harder for people to guess what’s in it for them, and frankly they won’t spend a lot of time trying!


The form expects a detailed description of the talk, along with an outline describing the flow of the talk. That said, it’s not expected that the talk you outline in August is precisely the same talk you deliver the following March. However, if your talk is accepted, the outline will be made public online (it will not be printed in the conference program), so you’d like to hit the outline as close as possible.

The abstract section will be used by the program committee to answer various questions about the talk, possibly including (but certainly not limited to):

  • Whether the talk’s title and description actually describe the talk as detailed in the abstract. Will attendees get pretty much what they expect if they only read the title and description of the talk?
  • Whether the talk appears to target the correct audience level. If you’re targeting a novice audience, your abstract should not go into topics that are beyond that audience level.
  • Whether the scope of the talk is realistic given the time constraints. If you asked for a 30-minute slot, your abstract should not make the committee think that it would be impossible to cover all of the material even given a whole hour. It’s not uncommon to be a little off in this regard, but being really far off could be an indicator that the proposer may not have thought this through very well.
  • Whether the talk is organized and has a logical flow that incorporates any known essential, obvious topics that should be touched on.

Additional Notes

This is a free-form text field where you can pretty much talk directly to the Program Committee to let them know in your own way why you think your talk is awesome, how you envision it coming off, and how you see the audience benefitting from it and finding value in attending the talk.

Although there are no hard requirements for this section of the submission form, you should absolutely, positively include any of the following that you can:

  • If your talk is about a new software project, a link to the project’s homepage, repository, and anything other relevant articles, interviews, testimonials, etc., about the project.
  • Links to any online slides or videos from any presentations you’ve given previously.
  • Comments discussing how you’d handle moving from a 45-minute to 30-minute slot, or from an Extreme slot to a regular slot, etc. In general, it helps the committee to know you’ve thought about contingencies in your proposal.

Great, so… How do I do this?

If you’ve never written a proposal before, and you’re not sure what you want to talk about, don’t have a crystal clear vision for a talk, have trouble narrowing the scope of your idea, and don’t know exactly where to start, I have a few ideas that might help you get the proposal creation juices flowing:

  • Write down some bullet points in a plain text file that are titles or one-line summaries of talks you’d like to see. Forget about whether you’re even willing or able to actually produce these talks – the idea is to start moving things from your brain onto a page. When you’ve got 5-10 of these points, reflect:
    • Could you deliver any of these yourself?
    • Could you apply an idea contained in a point to a topic you’re more familiar with?
    • Is there a topic related to any of the points that touch on things you know well?
    • Do any of these points jog your memory and make you think of projects you’ve worked on in the past that might be a source for a talk idea?
  • Do an informal audit of what you’ve done over the past year.
    • Were there problems you faced that there’s no good solution for?
    • Did you grow in some way that was really important, and could you help others to learn those lessons, and learn why those lessons are important?
    • Did you make use of a new technology?
    • Did you change how you do your job? Your development workflow? Your project lifecycle? Automation? Task management?
  • Go through the talks on It’s such an enormous, and enormously valuable trove. You could just scan the titles and see if something comes up. If that doesn’t work, click on a few, but don’t watch the talk: skip to the Q&A at the end. Buried in the Q&A are always these gems that are only tangentially related, and it is not uncommon to hear a speaker respond with “…but that’s another whole talk…”. They’re sometimes right.

Make it happen!