Exploring Python’s OS Module

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Python OS modules allow users to interact with files and directories. There are many functions or methods that Python employs in working with files or directories. However, in this article, we will consider three (3) essential functions. Now, let’s dive straight into it! Python – os.rename() Python OS rename() file method renames a file or … Read more

The Matrix Find Algorithm in Python

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Challenge: How to find an element in a sorted matrix where row and column values increase monotonically? What is a matrix? A matrix is a table of values consisting of rows and columns. Here, we represent the matrix as a list of integer lists. Hence, we can access matrix values with the indexing and slicing … Read more

Introduction To Machine Learning And Its Applications

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Machine learning is one of the fastest-growing technologies and it is going to play a pivotal role in the future of technology. With the help of various algorithms machine learning is used to build mathematical models that have the capability to make predictions based on historical data or past data. Currently, it is already being … Read more

Captive User Interfaces — Why You Should Avoid Them

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This tutorial shows you the meaning of captive user interfaces and why they’re discouraged under the Unix philosophy. I’ve written this as a first chapter draft for my upcoming book “From One to Zero” to appear in 2020 with San Francisco-based publisher NoStarch. What’s a Captive User Interface (CUI)? A captive user interface is a … Read more

The Fibonacci Series in Python

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The Fibonacci series was discovered by the Italian mathematician Leonardo Fibonacci in 1202 and even earlier by Indian mathematicians. The series appears in unexpected areas such as economics, mathematics, art, and nature. Algorithm Sketch In the following, we give a simple algorithm to calculate the Fibonacci numbers. The series starts with the Fibonacci numbers zero … Read more

Python exec() — A Hacker’s Guide to A Dangerous Function

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Python’s exec() function executes the Python code you pass as a string or executable object argument. This is called dynamic execution because, in contrast to normal static Python code, you can generate code and execute it at runtime. This way, you can run programmatically-created Python code. Have you ever wondered about the limits of a … Read more

Data Preprocessing

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Introduction Data preprocessing is a technique that is used to transform raw data into an understandable format. Raw data often contains numerous errors (lacking attribute values or certain attributes or only containing aggregate data) and lacks consistency (containing discrepancies in the code) and completeness. This is where data preprocessing comes into the picture and provides a proven method of … Read more

Python complex() — A Useless Python Feature?

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The Python complex() method returns a complex number object. You can either pass a string argument to convert the string to a complex number, or you provide the real and imaginary parts to create a new complex number from those. This article shows you how to use Python’s built-in complex() constructor. You’ll not only learn … Read more

Python Default Arguments

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This tutorial introduces the concept of default arguments in Python. A default argument is a function argument that takes on a default value if you don’t pass an explicit value for when calling the function. For example, the function definition def f(x=0): <body> allows you to call it with or without the optional argument x—valid … Read more

Как преобразовать список чисел с плавающей запятой в список целых чисел в Питоне

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Самый питонический способ преобразовать список чисел с плавающей запятой fs в список целых чисел – использовать однострочный код fs = [int (x) for x in fs]. Он перебирает все элементы в списке fs, используя понимание списка, и преобразует каждый элемент списка x в целочисленное значение с помощью конструктора int (x). В этой статье показаны простейшие … Read more