Python getattr() and setattr() Nested

Understanding Python’s setattr() and getattr() Functions Next, you’ll learn about the “normal”, non-nested and non-recursive get and set attribute functions. If you already know them well, there’s no need to read this section and you can skip ahead right to the problem formulation and solution. Let’s start with the setattr() function, followed by getattr(). setattr() … Read more

(Solved) Python TypeError ‘Method’ Object is Not Subscriptable

The “TypeError: ‘method’ object is not subscriptable” occurs when you call a method using square brackets, e.g., object.method[3]. To fix it, call the non-subscriptable method only with parentheses like so: object.method(3). How Does the Error Occur (Example) In the following minimal example, you attempt to define a custom “list” class and you try to access … Read more

How to Retrieve a Single Element from a Python Generator

This article will show you how to retrieve a single generator element in Python. Before moving forward, let’s review what a generator does. Quick Recap Generators 💡 Definition Generator: A generator is commonly used when processing vast amounts of data. This function uses minimal memory and produces results in less time than a standard function. … Read more

Python Package Version: the __version__ Attribute

Python __version__ Attribute Python contains many “Magic Methods/Attributes”. One of these is __version__ commonly called “Dunder version” because of the double underscore before and after version. In this article, I will briefly look at what a Dunder Method/Attribute is and talk about __version__. What Does a Dunder Method/Attribute Do? Dunder Methods/Attributes, also called “Magic Methods” … Read more

Python __aiter__() and __anext__() Magic Methods

object.__aiter__(self) object.__anext__(self) 💡 Summary: Python’s __aiter__() and __anext__() methods are used to implement an asynchronous for loop (keywords: async for). In contrast to a normal (synchronous) for loop, an asynchronous for loop iterates over an asynchronous source. __aiter__() returns an asynchronous iterator object (in many cases it’s simply a reference to itself: return self) __anext__() … Read more

Python __aexit__() Magic Method

object.__aexit__(self, exc_type, exc_val, exc_tb) 💡 Summary: Python’s __aexit__() magic method is semantically similar to __exit__() but is used for asynchronous and parallel programming. Python calls the __aexit__() magic method when leaving an async with block whereas the __aenter__() method is called when entering it. An object that implements both __aenter__() and __aexit__() methods is called … Read more