Classes are a way of grouping related bits of information together into a single unit (also known as an object), along with functions that can be called to manipulate that object (also known as methods). For example, if you want to track information about a person, you might want to record their name, address and […]
Category: Python Tutorials
A comprehensive guide that takes you from the basic to advanced concepts in the Python programming language.
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We’ve covered a lot of ground in this series of articles, so let’s now put it all together and work through a real-life application. A common task is to parse a Windows INI file, which are key/value pairs, separated into sections, something like this:
Let’s first write a bit of Python code that reads […]
In the first two parts of this series, we looked at some fairly advanced usage of regular expressions. In this part, we take a step back and look at some of the other functions Python offers in the re module, then we talk about some common mistakes people regularly (ha!) make. Useful Python Regular Expression […]
In the first part of this series, we looked at the basic syntax of regular expressions and some simple examples. In this part, we’ll take a look at some more advanced syntax and a few of the other features Python has to offer. Regular Expression Captured Groups So far, we’ve searched within a string using […]
Searching within a string for another string is pretty easy in Python:
>>> str = 'Hello, world'
This is fine if we know exactly what we’re looking for, but what if we’re looking for something not so well-defined? For example, if we want to search for a year, then we know it’s going to be a 4-digit sequence, but […]
Manipulating files is an essential aspect of scripting in Python, and luckily for us, the process isn’t complicated. The built-in open function is the preferred method for reading files of any type, and probably all you’ll ever need to use. Let’s first demonstrate how to use this method on a simple text file. For clarity, […]
Strings are among the most commonly used data types in Python, and there might be times when you want to (or have to) work with strings containing or entirely made up of characters outside of the standard ASCII set (e.g. characters with accents or other markings). Python 2.x provides a data type called a Unicode […]
Overview of Python Lists and Tuples Two of the most commonly used built-in data types in Python are the list and the tuple. Lists and tuples are part of the group of sequence data types—in other words, lists and tuples store one or more objects or values in a specific order. The objects stored in […]
The Python Dictionary (dict): An Overview Among the built-in Python data types is a very versatile type called a dictionary. The dictionary is similar to lists and tuples because they act as storage units for other objects or variables you’ve created. Dictionaries are different from lists and tuples because the group of objects they hold […]
Object orientation is a central concept in Python, as well as many other languages. Understanding the concept, and applying it well, will enable you to build much more elegant and manageable software. What is Object Oriented Programming in Python? You’ll often hear it said that, in Python, everything’s an object. It’s pretty much true, with […]