November 2021

Printing and returning are fundamentally different concepts in Python. Example Here is an example of a function that prints a value. If you call this function, you can see a greeting in the console: Output: Here is an example of a function that returns a value. When you call this function with a name input,

In mathematics, random walk is the process in which objects randomly wander away from where they started. Here is a video that shows how a particle collides with other particles in two dimensions. The path of the yellow particle is described by random walk: Random walk is easy to visualize using Python. Here are illustrations

To check if a Python string contains all the characters from a list, check if each character exists in the word: Here is an example: Output: To learn other useful string methods in Python, feel free to check this article. Below you find a more detailed guide of how to check if a string contains

In Python, you can inspect any object with the built-in help() function. For example: Output: If this is not enough, there are other functions you can call on an object to get more specific info about the object: In this guide, we take a closer look at each of these built-in functions to make exploring

In Python, you can use the del statement to destroy an object. The syntax is simple: For example, let’s create a variable and delete it: Output: What Can Be Deleted with ‘del’ in Python? In Python, everything is an object. The del statement can be used to delete objects. Thus you can delete almost anything

The __add__() method in Python specifies what happens when you call + on two objects. When you call obj1 + obj2, you are essentially calling obj1.__add__(obj2). For example, let’s call + on two int objects: Output: This works, because int implements the __add__() method behind the scenes. To make a custom object support addition with

The __abs__() method in Python specifies what happens when you call the built-in abs() function on an object. For example, let’s call abs() on a negative number: Output: The result is the absolute value of the negative number, that is, the distance from 0. The important part here is to understand that calling abs(n) is

In Python, you can start indexing from the end of an iterable. This is known as negative indexing. For example, let’s get the last value of a list: Output: Here is an illustration of how the list indexing works in Python: This means you can use both positive and negative indexes to access iterables. This