Downloading files from different online resources is one of the most important and common programming tasks to perform on the web. The importance of file downloading can be highlighted by the fact that a huge number of successful applications allow users to download files. Here are just a few web application functions that require downloading files: File sharing Data mining Retrieving website code (CSS, JS, etc) Social media These are just a few of the applications that come to mind, […]

This tutorial will give an introduction to what Python exceptions are, the most common types of exceptions, and how to handle raised exceptions with the try and except clauses. What is a Python Exception? A Python exception is a construct used to signal an important event, usually an error, that occurs when executing a program. An exception may cause the program to stop if it is not properly “caught” (i.e. handled correctly). If you think that your program might raise […]

Introduction Modules are the highest level organizational unit in Python. If you’re at least a little familiar with Python, you’ve probably not only used ready modules, but also created a few yourself. So what exactly is a module? Modules are units that store code and data, provide code-reuse to Python projects, and are also useful in partitioning the system’s namespaces in self-contained packages. They’re self-contained because you can only access a module’s attributes after importing it. You can also understand […]

Choosing the Right Loop Construct Python offers a variety of constructs to do loops. This article presents them and gives advice on their specific usage. Furthermore, we will also have a look at the performance of each looping construct in your Python code. It might be surprising for you. Loops, Loops, Loops A programming language typically consists of several types of basic elements, such as assignments, statements, and loops. The idea behind a loop is to repeat single actions that […]