Python Return Error From Function

Problem Formulation 💬 Question: How do you write a function that returns a real Python error instead of an “error code” such as -1 or None in case something got wrong? For example, you may want to check the function input arguments for having the correct type or length (in the case of iterable arguments) … Read more

Python foreach Loop

💡 Question: Does Python have a for each or foreach loop? If so, how does it work? If not, what is the alternative? This article will shed light on these questions. I’ll give you the summary first and dive into the details later: Python has three alternatives to the “for each” loop: A simple for … Read more

Python __del__() Magic Method

Python’s magic method __del__() is called the finalizer method or, wrongly, the destructor method – – the latter being wrong because it doesn’t actually destroy the object. Python calls __del__() upon deletion of a given instance. For example, the expression del my_obj will eventually initiate my_obj.__del__(). We call this a “Dunder Method” for “Double Underscore … Read more

Python Pass Statement

The pass statement does nothing when executed. You can use it as a placeholder for future code so that you can focus on the high-level structure first and implement the details later. For example, functions, loops, class definitions, or if statements require at least one statement in their indentation block. Think of the pass statement … Read more