Python tutorials

September 25, 2020 Python

Quicksort in Python

Introduction Quicksort is a popular sorting algorithm and is often used, right alongside Merge Sort. It’s a good example of an efficient sorting algorithm, with an average complexity of O(nlogn). Part of its popularity also derives from the ease of implementation. We will use simple integers in the first part of this article, but we’ll give an example of how to change this algorithm to sort objects of a custom class. Quicksort is a representative of three types of sorting […]

September 25, 2020 Python

Using cURL in Python with PycURL

Introduction In this tutorial, we are going to learn how to use PycURL, which is an interface to the cURL library in Python. cURL is a tool used for transferring data to and from a server and for making various types of data requests. PycURL is great for testing REST APIs, downloading files, and so on. Some developers prefer using Postman for testing APIs but PycURL is another suitable option to do so as it supports multiple protocols like FILE, […]

September 25, 2020 Python

Dimensionality Reduction in Python with Scikit-Learn

Introduction In machine learning, the performance of a model only benefits from more features up until a certain point. The more features are fed into a model, the more the dimensionality of the data increases. As the dimensionality increases, overfitting becomes more likely. There are multiple techniques that can be used to fight overfitting, but dimensionality reduction is one of the most effective techniques. Dimensionality reduction selects the most important components of the feature space, preserving them and dropping the […]

September 25, 2020 Python

Insertion Sort in Python

Introduction If you’re majoring in Computer Science, Insertion Sort is most likely one of the first sorting algorithms you have heard of. It is intuitive and easy to implement, but it’s very slow on large arrays and is almost never used to sort them. Insertion sort is often illustrated by comparing it to sorting a hand of cards while playing rummy. For those of you unfamiliar with the game, most players want the cards in their hand sorted in ascending […]

September 25, 2020 Python

Unit Testing in Python with Unittest

Introduction In almost all fields, products are thoroughly tested before being released to the market to ensure its quality and that it works as intended. Medicine, cosmetic products, vehicles, phones, laptops are all tested to ensure that they uphold a certain level of quality that was promised to the consumer. Given the influence and reach of software in our daily lives, it is important that we test our software thoroughly before releasing it to our users to avoid issues coming […]

September 25, 2020 Python

Tensorflow 2.0: Solving Classification and Regression Problems

After much hype, Google finally released TensorFlow 2.0 which is the latest version of Google’s flagship deep learning platform. A lot of long-awaited features have been introduced in TensorFlow 2.0. This article very briefly covers how you can develop simple classification and regression models using TensorFlow 2.0. Classification with Tensorflow 2.0 If you have ever worked with Keras library, you are in for a treat. TensorFlow 2.0 now uses Keras API as its default library for training classification and regression […]

September 25, 2020 Python

List Comprehensions in Python

A list is one of the fundamental data types in Python. Every time you come across a variable name that’s followed by a square bracket [], or a list constructor, it is a list capable of containing multiple items, making it a compound data type. Similarly, it is also a breeze to declare a new list and subsequently add one or more items to it. Let us create a new populated list, for example: >>> new_list = [1, 2, 3, […]

September 25, 2020 Python

Serving Files with Python’s SimpleHTTPServer Module

Introduction Servers are computer software or hardware that processes requests and deliver data to a client over a network. Various types of servers exist, with the most common ones being web servers, database servers, application servers, and transaction servers. Widely used web servers such as Apache, Monkey, and Jigsaw are quite time-consuming to set up when testing out simple projects and a developer’s focus is shifted from producing application logic to setting up a server. Python’s SimpleHTTPServer module is a […]

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 […]

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