One of the things new (or even experienced) VB6 programmers need to know about are the relevance/importance of ByVal and ByRef when passing parameters to a function or subroutine, as not knowing this could cause hard-to-detect bugs and unexpected results — and not being able to create more advanced codes. ByVal ByVal means pass “by …
Although implementing Dependency Injection design pattern and Callbacks can be implemented in most programming languages (even in VB6), it’s just cleaner/neater to do in Python. These are also scenarios or use cases where you intentionally would pass the function object instead of it’s return value. Function as dependency To write a function that behaves differently …
Using Functions for Dependency Injection and as Callback in Python Read More »
One of the important (and usually confusing) concepts a developer needs to understand in Python is the use (or omission) of parentheses. This may seem so trivial, even obvious but it’s something that can cause problems to a lot of programmers, especially new ones coming from a different programming language. At best it could cause …
If you’re working on different projects, especially large projects, you should be using Python Environments. So what is a Python Environment and why should I care? The best definition is the one from the official documentation: The venv module provides support for creating lightweight “virtual environments” with their own site directories, optionally isolated from system site directories. …
Have you seen this in any VB6 projects you’ve ever worked on? If you haven’t, or have but didn’t understand what this is, read on cause I’ll tell you what it is and why and when you want to use this. PublicNotCreatable is one of the values that you can set for the class Instancing …
In line with making apps flexible, Python really, really makes it super easy to accomplish that. And this will be (sort-of) a follow up on my previous blog about args and kwargs. If you haven’t read that, here it is: From the previous blog, we’ve seen how to pass positional and keyword arguments to a …
Using Tuple and Dict as Args and Kwargs in Python Read More »
How do you make your code flexible? Well, there are many ways to do that, and one of them is by moving one or more of its functionalities outside of it. This makes your code behave dynamically different, based on what it was fed with. Sounds confusing? Yep, that’s what I thought too when I …
If you’ve been using VB.Net or any modern programming languages, you’ve probably used Try..Catch (or try..except) when performing routines that could potentially fail. But in the classic Visual Basic 6.0 language, there is no such construct… right? Technically there’s none…but…there is a way to mimic that behavior — or at least the mechanism using pure/native …
Probably one of the most misunderstood (or mysterious) terms in Python are the “args” and “kwargs”, prefixed with a single and double star (*) character respectively, but definitely one of the best features of Python once you understand how it works. If you have not seen this before, here’s a sample code that contains both …
If I’m going to create my own Python Tutorial Course, here’s what I’d probably use as course syllabus: Basics hello, world operators & expressions variables & scope data types type casting data structures value comparison multiple assignment comments user input output formatting indentation decision making (branching) error handling Intermediate function loop args & kwargs importing …