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Programming Articles
Page 54 of 2547
How to Call a Parent class method in Python ?
In object-oriented programming, inheritance allows you to create new classes based on existing ones, providing a way to reuse code and organize your program's structure. Python, being an object-oriented language, supports inheritance and allows you to override methods defined in parent classes in child classes. However, there may be situations where you want to leverage the functionality of a parent class method while extending or modifying it in the child class. Method Overriding in Python Before we learn about calling parent class methods, let's briefly discuss method overriding. Method overriding is a feature in object-oriented programming that allows ...
Read MoreGet the List of all empty Directories in Python
When working with file systems and directories in Python, it's often useful to identify and handle empty directories. Empty directories can accumulate over time, taking up unnecessary space or cluttering the directory structure. Being able to programmatically find and handle these empty directories can help streamline file system operations and improve overall organization. In this tutorial, we will explore different methods to obtain a list of all empty directories using Python. We will cover two approaches: the first using the os.walk() function, and the second utilizing the os.scandir() function. Method 1: Using os.walk() The os.walk() function is ...
Read MoreFunctional Transforms for Computer Vision using PyTorch
Computer vision tasks often require preprocessing and augmentation of image data to improve model performance and generalization. PyTorch provides a powerful library for image transformations called torchvision.transforms. While predefined transforms cover many use cases, functional transforms offer greater flexibility for custom transformations using PyTorch tensors and functions. Understanding Transforms in PyTorch Transforms in PyTorch are operations that modify images or their properties. There are two main types: class transforms and functional transforms. Class transforms are implemented as classes with defined parameters, while functional transforms are implemented as functions that operate directly on input data. Functional transforms offer ...
Read MoreFinding All substrings Frequency in String Using Python
String manipulation and analysis are fundamental tasks in many programming scenarios. One intriguing problem within this domain is the task of finding the frequency of all substrings within a given string. This article provides a comprehensive guide on efficiently accomplishing this task using Python. When working with strings, it is often necessary to analyze their contents and extract valuable information. The frequency of substrings is an important metric that can reveal patterns, repetitions, or insights into the structure of the string. By determining how many times each substring appears in a given string, we can gain valuable knowledge about ...
Read MoreFinding All possible space joins in a String Using Python
In natural language processing and text manipulation, finding all possible space joins in a string means generating every combination of a string with spaces inserted at different positions. This technique is useful for exploring word arrangements, text analysis, and generating permutations. Problem Statement Given a string, we want to generate all possible combinations by inserting spaces between characters. For example, with the string "abc", we can create combinations like "abc", "ab c", "a bc", and "a b c". Using Recursive Backtracking The most straightforward approach uses recursive backtracking. At each character position, we have two choices: ...
Read MoreDifference between Lock and Rlock objects
Concurrent programming involves the execution of multiple threads or processes concurrently, which can lead to challenges such as race conditions and data inconsistencies. To address these issues, Python provides synchronization primitives, including the Lock and RLock objects. While both objects serve the purpose of controlling access to shared resources, they differ in behavior and usage. The Lock object is a fundamental mutual exclusion mechanism. It allows multiple threads to acquire and release the lock, but only one thread can hold the lock at any given time. When a thread attempts to acquire a lock that is already held by ...
Read MoreAttributeError in Python
Python is a versatile and powerful programming language that allows developers to build a wide range of applications. However, like any programming language, Python is not immune to errors. One common error that developers encounter is the AttributeError. Let's explore what an AttributeError is, why it occurs, and how to handle it effectively. What is an AttributeError? An AttributeError is an exception that occurs when an object does not have a particular attribute or method that is being accessed. It is raised when an invalid attribute reference or assignment is made to an object. # Example ...
Read MoreAge Calculator using Python Tkinter
An age calculator in Python using Tkinter is a GUI (Graphical User Interface) application that allows users to determine their age based on their date of birth (DOB). To design the user interface of this application, we use various methods provided by the Tkinter library such as Tk(), pack(), Entry(), Button(), and more. GUI of Age Calculator Let us build a GUI-based age calculator where the user can enter their date of birth in the format of YYYY-MM-DD. The application will calculate and display the age in years, months, and days. ...
Read MoreAdding Custom Values Key in a List of Dictionaries in Python
In this article, we will learn how to add a custom key with corresponding values to a list of dictionaries in Python. This is a common task when working with structured data. Dictionaries in Python are collections of unordered items stored in the form of key-value pairs inside curly braces ? dictionary = {"key": "value", "name": "John"} print(dictionary) {'key': 'value', 'name': 'John'} Suppose we have a list of dictionaries called dict_list and a key new_key, with its values provided in a separate list value_list. The goal is to add new_key to each ...
Read MoreAdding action to CheckBox using PyQt5
Graphical User Interface (GUI) frameworks provide developers with the tools and capabilities to create visually appealing and interactive applications. PyQt5, a Python binding for the Qt framework, offers a robust toolkit for building GUI applications with ease. Among the fundamental components offered by PyQt5 is the CheckBox, a widget that allows users to select or deselect an option. By adding actions to CheckBoxes, we can enhance the functionality and interactivity of our applications. This feature enables us to perform specific tasks or trigger events based on the state of the CheckBox. Whether it is enabling or disabling a feature, ...
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