September 25, 2020 Python

Creating Command Line Utilities with Python’s argparse

Introduction Most of the user-facing software comes with a visually pleasing interface or via a decorated webpage. At other times, a program can be so small that it does not warrant an entire graphical user interface or web application to expose its functionality to the end-user. In these cases, we can build programs that are accessible via a Command Line Interface, or CLI. In this post, we will explore Python’s argparse module and use it to build a simple command-line […]

September 25, 2020 Python

Executing Shell Commands with Python

Introduction Repetitive tasks are ripe for automation. It is common for developers and system administrators to automate routine tasks like health checks and file backups with shell scripts. However, as those tasks become more complex, shell scripts may become harder to maintain. Fortunately, we can use Python instead of shell scripts for automation. Python provides methods to run shell commands, giving us the same functionality of those shells scripts. Learning how to run shell commands in Python opens the door […]

September 25, 2020 Python

Encoding and Decoding Base64 Strings in Python

Introduction Have you ever received a PDF or an image file from someone via email, only to see strange characters when you open it? This can happen if your email server was only designed to handle text data. Files with binary data, bytes that represent non-text information like images, can be easily corrupted when being transferred and processed to text-only systems. Base64 encoding allows us to convert bytes containing binary or text data to ASCII characters. By encoding our data, […]

September 25, 2020 Python

Merge Sort in Python

Introduction Merge Sort is one of the most famous sorting algorithms. If you’re studying Computer Science, Merge Sort, alongside Quick Sort is likely the first efficient, general-purpose sorting algorithm you have heard of. It is also a classic example of a divide-and-conquer category of algorithms. Merge Sort The way Merge Sort works is: An initial array is divided into two roughly equal parts. If the array has an odd number of elements, one of those “halves” is by one element […]

September 25, 2020 Python

Design Patterns in Python

Introduction Design Patterns are reusable models for solving known and common problems in software architecture. They’re best described as templates for dealing with a certain usual situation. An architect might have a template for designing certain kinds of door-frames which he fits into many of his projects, and a software engineer, or software architect, should know templates for solving frequent programming challenges. A good presentation of a design pattern should include: Name Motivating problem Solution Consequences Equivalent Problems If you […]

September 25, 2020 Python

Creational Design Patterns in Python

Overview This is the first article in a short series dedicated to Design Patterns in Python. Creational Design Patterns Creational Design Patterns, as the name implies, deal with the creation of classes or objects. They serve to abstract away the specifics of classes so that we’d be less dependent on their exact implementation, or so that we wouldn’t have to deal with complex construction whenever we need them, or so we’d ensure some special instantiation properties. They’re very useful for […]

September 25, 2020 Python

Working with Redis in Python with Django

Introduction Data is increasingly becoming a valuable commodity in the current era of technology and this necessitates the optimization of storage and access to this data. There are quite a few notable solutions for the storage of data, including Relational Database Management Systems (RDBMS) such as MySQL and PostgreSQL, which store data in a structured format using rows and columns and the relationships within the data. Apart from RDBMS, there are key-value stores that store data based on unique keys […]

September 25, 2020 Python

How to Get the Current Date and Time in Python

Introduction Logging, saving records to the database, and accessing files are all common tasks a programmer works on. In each of those cases, date and time play an important role in preserving the meaning and integrity of the data. Programmers often need to engage with date and time. In this article we will learn how to get the current date and time using Python’s builtin datetime module. With that module, we can get all relevant data in one object, or […]

September 25, 2020 Python

Heap Sort in Python

Introduction Heap Sort is another example of an efficient sorting algorithm. Its main advantage is that it has a great worst-case runtime of O(n*logn) regardless of the input data. As the name suggests, Heap Sort relies heavily on the heap data structure – a common implementation of a Priority Queue. Without a doubt, Heap Sort is one of the simplest sorting algorithms to implement and coupled with the fact that it’s a fairly efficient algorithm compared to other simple implementations, […]

September 25, 2020 Python

Introduction to Speech Recognition with Python

Speech recognition, as the name suggests, refers to automatic recognition of human speech. Speech recognition is one of the most important tasks in the domain of human computer interaction. If you have ever interacted with Alexa or have ever ordered Siri to complete a task, you have already experienced the power of speech recognition. Speech recognition has various applications ranging from automatic transcription of speech data (like voicemails) to interacting with robots via speech. In this tutorial, you will see […]

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