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Articles by Dev Prakash Sharma
Page 28 of 42
Good example of functional testing a Python Tkinter application
Functional testing validates whether a Python Tkinter application meets its specified requirements by testing the complete user workflow. Let's explore functional testing with a practical example of a text editor application that saves user input to files. Understanding Functional Testing In functional testing, we focus on: Backend API and database interactions User-server communication Input validation and output verification Complete user workflows For our Tkinter application, we'll test the entire process from user input to file creation and content verification. Example: Text Editor with File Save Functionality Here's a Tkinter application that accepts ...
Read MoreDynamically Resize Buttons When Resizing a Window using Tkinter
Python's Tkinter library provides powerful tools for creating GUI applications. When building user interfaces, you often want buttons to resize dynamically when the user changes the window size, creating a responsive layout. To make buttons resize dynamically, we use Tkinter's Grid geometry manager along with rowconfigure() and columnconfigure() methods. The key is setting the weight parameter and using the sticky option to control how widgets expand. How Grid Weight System Works The Grid system uses a weight-based approach where: weight=1 means the row/column will expand to fill available space sticky="nsew" makes the widget stretch in ...
Read MoreCreating a Transparent window in Python Tkinter
Python's Tkinter library provides a simple way to create GUI applications. One interesting feature is the ability to create transparent windows by controlling the window's opacity using the attributes method. To create a transparent window in Tkinter, we use the -alpha attribute which controls the window's opacity level. The alpha value ranges from 0.0 (completely transparent) to 1.0 (completely opaque). Syntax window.attributes('-alpha', opacity_value) Where opacity_value is a float between 0.0 and 1.0. Example Here's how to create a transparent window with 30% opacity ? # Importing the tkinter library from ...
Read MoreCreating a Frameless window in Python Tkinter
Tkinter is the most commonly used Python library for creating GUI-based applications. It has features like adding widgets and other necessary attributes. Let us suppose that we want to create a borderless window using tkinter. To create a borderless window, we can use the overrideredirect() method which basically disables the window manager and removes window elements such as the closing button, title bar, minimization button, and other standard window controls. Understanding overrideredirect() overrideredirect() is a Boolean function which accepts either True or False. When set to True, it creates a frameless window without standard window decorations. Once ...
Read MoreCreate a Date Picker Calendar in Tkinter
Tkinter is a popular Python library for creating desktop applications. It provides various widgets and methods to build interactive GUI applications with ease. Tkcalendar is a specialized tkinter package that provides calendar widgets for GUI applications. It allows users to select dates, schedule events, and perform various calendar operations through an intuitive interface. In this article, we will create a Date Picker calendar using the Tkcalendar package. First, install the package using pip install tkcalendar in your terminal or command prompt. Basic Date Picker Example Let's create a simple date picker with a calendar widget and ...
Read MoreAverage Speed Calculator using Tkinter
In this article, we will create a GUI-based application that calculates the average speed of a moving object. The average speed can be calculated using the following formula: Average Speed = Distance / [Hours + (Minutes/60)] We will use Tkinter's Spinbox widget to create input controls for Distance (Kilometers), Hours, and Minutes. The Spinbox allows users to select values from a defined range using up/down arrows. Complete Example from tkinter import * # Create an instance of tkinter frame win = Tk() # Set the geometry and resize the frame win.geometry("700x400") ...
Read MoreMake three numbers Zero in Python
Let us suppose we have three numbers. The task is to count the total number of optimal steps to make all these numbers zero by repeatedly removing 1 from any two numbers at a time. Problem Statement Given three numbers, find the minimum number of steps to make all three numbers zero, where in each step you can subtract 1 from any two numbers. Example Input: a = 4 b = 4 c = 6 Output: 7 Step-by-step explanation: Initial state: (4, 4, 6) Step 1: Remove ...
Read MoreLargest Merge of Two Strings in Python
When merging two strings, we want to create the lexicographically largest possible result by choosing characters strategically. This problem involves comparing entire remaining substrings at each step to make optimal choices. Problem Understanding Given two strings a and b, we need to merge them by repeatedly choosing which string to take the next character from. The key rule is: always choose from the string whose remaining portion is lexicographically larger. Algorithm Steps Compare the remaining portions of both strings Take the first character from the lexicographically larger string Repeat until both strings are empty Append ...
Read MoreCopy list with random Pointer in Python
A Linked List with Random Pointers is a data structure where each node contains data, a next pointer, and an additional random pointer that can point to any node in the list. Creating a deep copy of such a list requires preserving both the structure and random pointer relationships. The challenge is to copy not just the values and next pointers, but also maintain the correct random pointer connections in the new list. Problem Example Consider a linked list where each node has a random pointer: 1 ...
Read MoreBreadth First Search on Matrix in Python
Breadth First Search (BFS) on a matrix finds the shortest path between two cells by exploring neighbors level by level. In a 2D matrix, each cell can move in four directions: left, right, up, and down. Matrix Cell Types In BFS matrix problems, cells are typically represented by different values ? 0 − Blocked cell (cannot move through) 1 − Open cell (can move through) 2 − Source cell (starting point) 3 − Destination cell (target point) BFS Algorithm for Matrix The algorithm uses a queue to explore cells level by level ? ...
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