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Articles on Trending Technologies
Technical articles with clear explanations and examples
Getting the Cursor position in Tkinter Entry widget
We are already familiar with input forms where various single Entry fields are created to capture the user input. With Tkinter, we can also create a single input field using the Entry widget. Each character in the Entry field that the user enters is indexed. Thus, you can retrieve this index to get the current position of the cursor by using the index() method. To retrieve the current location of the cursor, you can pass the INSERT argument in this function.Example# Import required libraries from tkinter import * from tkinter import ttk # Create an instance of tkinter window ...
Read MoreHow to specify the file path in a tkinter filedialog?
Tkinter offers several built-in functions and class library methods to build components and user-actionable items of an application. filedialog is one of the tkinter modules that provides classes and library functions to create file/directory selection windows. You can use filedialog where you need to ask the user to browse a file or a directory from the system.You can also specify the location of the directory from where a particular file should be picked up. To display the filedialog that starts from a particular location, use the initialdir = argument in the static factory function askopenfilename(initialdir=). This function creates a ...
Read MorePython Tkinter – How to export data from Entry Fields to a CSV file?
The Entry widget is used to accept single-line text strings from users.Text widget − Displays multiple lines of text that can be edited.Label widget − Displays one or more lines of text that cannot be modified by the user.Importing tkinter, csv and creating the main window. Name the output window "Data Entry"(any name for output window) and Create three functions based on the output you need. Here the function of add, save and clear is built in to make the buttons work functionally.After providing the input in the window, click the add button. The add function will display a message ...
Read MoreHow to use floating image in HTML page?
To use a floating image in HTML, use the CSS property float. It allows you to float an image left or right. More property values include the following:Sr.No.Property Value & Description1noneNot floated2leftFloats to the left3rightFloats to the right4initialDefault valueExampleYou can try to run the following code to use floating image in HTML. Here’s the usage of float right and float left CSS attribute HTML Floating Image Float Right The below image floats to the right. This is demo text. ...
Read MorePython – scipy.linalg.norm
The norm() function of the scipy.linalg package is used to return one of eight different matrix norms or one of an infinite number of vector norms.Syntaxscipy.linalg.norm(x)Where x is an input array or a square matrix.Example 1Let us consider the following example −# Importing the required libraries from scipy from scipy import linalg import numpy as np # Define the input array x = np.array([7 , 4]) print("Input array:", x) # Calculate the L2 norm r = linalg.norm(x) # Calculate the L1 norm s = linalg.norm(x, 3) # Display the norm values print("Norm Value of r :", ...
Read MorePython – scipy.linalg.inv
The scipy.linalg package contains a of different functionalities that are used for Linear Algebra. One of them is the inv() function, which is used to find the inverse of a square matrix.Syntaxscipy.linalg.inv(x)Where x is a square matrix.Example 1Let us consider the following example −# Import the required libraries from scipy import linalg import numpy as np # defines the array a = np.array([[5, 3], [6, 4]]) print("Input matrix :", a) # Finding the inverse of a square matrix x = linalg.inv(a) print(" Inverse of Square Matrix A :", x)OutputThe above program will generate the following output −Input matrix ...
Read MorePython – scipy.linalg.det
The scipy.linalg package contains a set of different functionalities that are used for Linear Algebra. One of them is the det() function. This function is used to find the determinant of a two-dimensional matrix.Syntaxscipy.linalg.det(x)Where x is a square matrix.Example 1Let us consider the following example −# Importing the required libraries from scipy import linalg import numpy as np # Initialize the matrix A A = np.array([[8, 5], [3, 4]]) print("Input Matrix :", A) # Find the determinant of matrix X x = linalg.det(A) print("Determinant Value of A:", x)OutputIt will generate the following output −Input Matrix : [[8 5] ...
Read MorePython – scipy.special.logsumexp
The scipy.special package contains a set of different functionalities that are used for mathematical physics. One of them is the logsumexp() function. This function is used to compute the log of the sum of exponentials of input elements. Let us take a couple of examples and see how to use this function.Syntaxscipy.special.logsumexp(x)where, x is the input value.Example 1Let us consider the following example −# Import logsumexp from scipy.special from scipy.special import logsumexp import numpy as np # Input array a = np.arange(10) print("Input Array:", a) # logsum() function res = logsumexp(a) print("logsumexp of a:", res)OutputIt will produce the ...
Read MoreHow to use small font in HTML?
To set the small font in HTML, use the style attribute. The style attribute specifies an inline style for an element. The attribute is used with the HTML tag, with the CSS property font-size. HTML5 do not support the tag, so the CSS style is used to add font size.Just keep in mind, the usage of style attribute overrides any style set globally. It will override any style set in the HTML tag or external style sheet.ExampleYou can try the following code to add font smaller than the default font in an HTML page ...
Read MoreHow to directly modify a specific item in a TKinter listbox?
Tkinter is a Python-based GUI application development library which is generally used to build useful functional desktop applications. The Listbox widget is another tkinter widget, which is used as a container to display a list of items in the form of a Listbox.To define a list of items in a Listbox widget, you'll need to create a constructor of Listbox(root, width, height, **options). You can insert as many items as you want to display in the listbox.Suppose you want to modify a specific item in a tkinter Listbox, then you can first create a button to select the item from ...
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