Improve Your Python: Understanding Unit Testing
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
Improve Your Python: Decorators Explained
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
Open Sourcing a Python Project the Right Way
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
Improve Your Python: 'yield' and Generators Explained
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
Drastically Improve Your Python: Understanding Python's Execution Model
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
Write Cleaner Python: Use Exceptions
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
Creating and Optimizing a Letterpress Cheating Program in Python
Looking for Python Tutoring? Remote and local (NYC) slots still available! Email me at jeff@jeffknupp.com for more info. I first discovered the iOS game Letterpress while reading Marco Arment's The Magazine (Letterdepressed, Josh Centers, Issue 5). I installed it immediately after finishing the article and was instantly hooked. It's a compelling mix of strategy and vocabulary demonstration. Easier
Learning Python via Django Considered Harmful
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
Is Python call-by-value or call-by-reference? Neither.
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
Writing Idiomatic Python
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
Starting a Django Project the Right Way
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
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