Python Array Data Structure. Arrays are a basic data structure found in most programming languages and are widely used in many algorithms. This section introduces some array implementations in Python. These arrays only use core features of the language or…
The “Zen of Python” teaches us to use only one, well-defined way to do something. It can be confusing to discover that there are four main methods for string formatting in Python. This section explains how these four string formatting…
Python List Slicing Techniques, Python list objects have a convenient slicing feature. Slicing can be considered an extension of the square bracket indexing syntax and is often used to access a range of elements in an ordered collection. For example,…
Python Defining Your Own Exception Classes When I first started using Python, I was hesitant to write custom exception classes in my code. However, defining your own error types has many benefits, such as clearly indicating potential errors and making…
Python Using Abstract Base Classes to Avoid Inheritance Errors. Abstract base classes (ABCs) are used to ensure that derived classes implement specific methods from a base class. In this section, you’ll learn about their advantages and how to define them…
How to Write Multi-Line Statements in Python In Python, the preferred way to wrap long expressions across multiple lines is to enclose them in parentheses. Example a=(10**2+ 10*5 -10) print (a) Output This will produce a result of…
Python Generators, we spent a lot of time writing class-based iterators in the Python Iterator Tips section. While it’s fine from a teaching perspective, as you can see from the examples, writing this iterator class requires a lot of boilerplate…
Using the cat Command in Python The cat command is a Linux shell command. It is short for concatenate and is one of the most commonly used shell commands. It can be used for a variety of purposes, such as…
Moving or Copying Files and Directories in Python Suppose we want to copy or move files and directories but don’t want to call shell commands to do it. The shutil module has portable functions for copying files and directories. Example…
Python Program to Print Key-Value Pairs in a Dictionary Python A dictionary in Python is a data structure that stores a collection of key-value pairs. Unlike other data structures, a dictionary contains two values at a specific location. A dictionary…