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Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. The class is a fundamental building block in Python. It is the underpinning for not only many popular programs and libraries, but the Python standard library as well. Understanding what classes are, when to use them, and how they can be useful is essential, and the goal of this
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. There are two recent trends I really hate: DevOps and the notion of the "full-stack" developer. The DevOps movement is so popular that I may as well say I hate the x86 architecture or monolithic kernels. But it's true: I can't stand it. The underlying cause of my pain? This fact
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. When I released bull as an open source project, it was in quite a state. Everything was in a single file, there was inline HTML (ew), and both tests and documentation were non-existent. Over the past week, I've spent some time "productionizing" bull, and recounting the steps I t
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. As a developer, I sometimes forget the power I wield. It's easy to forget that, when something doesn't work the way I'd like, I have the power to change it. Yesterday, I was reminded of this fact as I finally got fed up with the way payments are processed for my book. After bein
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. metaclasses and the type keyword are each examples of little used (and, thus, not well understood by most) Python constructs. In this article, we'll explore the different, erm, "types" of type() and how the Little-known use of type relates to metaclasses. Are You My Type? The fi
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. One frequent source of confusion for novice developers is the subject of testing. They are vaguely aware that "unit testing" is something that's good and that they should do, but don't understand what the term actually means. If that sounds like you, fear not! In this article, I
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. I've previously written about "yield" and generators. In that article, I mention it's a topic that novices find confusing. The purpose and creation of decorators is another such topic (using them, however, is rather easy). In this post, you'll learn what decorators are, how they
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. Most Python developers have written at least one tool, script, library or framework that others would find useful. My goal in this article is to make the process of open-sourcing existing Python code as clear and painless as possible. And I don't simply mean, "create GitHub repo
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. Prior to beginning tutoring sessions, I ask new students to fill out a brief self-assessment where they rate their understanding of various Python concepts. Some topics ("control flow with if/else" or "defining and using functions") are understood by a majority of students befor
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. Those new to Python are often surprised by the behavior of their own code. They expect A but, seemingly for no reason, B happens instead. The root cause of many of these "surprises" is confusion about the Python execution model. It's the sort of thing that, if it's explained to
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. Many programmers have had it drilled into their head that exceptions, in any language, should only be used in truly exceptional cases. They're wrong. The Python community's approach to exceptions leads to cleaner code that's easier to read. And that's without the monstrous hit t
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. I learned to program in Python indirectly. I was interested in learning about web application development and heard good things about Django. I didn't know Python, but the syntax and documentation looked straightforward enough. Like any reasonable programmer, I figured the langu
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. One aspect of Python programming that trips up those coming from languages like C or Java is how arguments are passed to functions in Python. At a more fundamental level, the confusion arises from a misunderstanding about Python object-centric data model and its treatment of ass
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. As someone who evangelizes Python at work, I read a lot of code written by professional programmers new to Python. I've written a good amount of Python code in my time, but I've certainly read far more. The single quickest way to increase maintainability and decrease 'simple' bu
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. Introduction What follows is the first in a series of articles on developing a formal methodology for software optimization I've been working on for some time. Each week, I'll post the newest installment here (they're all written, I'm just wary of dumping the whole thing here al
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. Using Django 1.6? Check out the new, updated version of this post with Django 1.6 specific changes and updates. One of the things I wish I had known when starting my Django project for IllestRhyme was "How do I start a real Django project". As in, one that's actually going to be
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. For more than a decade, no single issue has caused more frustration or curiosity for Python novices and experts alike than the Global Interpreter Lock. An Open Question Every field has one. A problem that has been written off as too difficult, too time consuming. Merely mentioni
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. As a follow-up to my post Starting a Django Project the Right Way, I wanted to talk about the importance of writing tests for Django applications. I previously mentioned that my first site IllestRhyme, has no app specific tests for it. This is both embarrassing and true. I've lo
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