Highlight Words Ending with 'python' in Python Tkinter

This article will guide you through the process of highlighting words ending with 'python' in a Python Tkinter application. Specifically, we will create a simple text editor that can identify, highlight, and mark words ending with the keyword 'python'. This is a valuable feature for developers or users who often work with Python code, making it easier to quickly find instances of a language or phrase during code review or editing.

Introduction to Tkinter

Tkinter is the standard GUI (Graphical User Interface) library for Python. It is designed to create compelling user interfaces with ease and comes built into the Python standard library, so no additional installation is required.

Setting Up the Tkinter Environment

To start, open your terminal and create a Python file named highlight_python_ Begin by importing the necessary Tkinter modules with the following code:

import tkinter as tk from tkinter import simpledialog

Next, define the main() function to initialize the Tkinter application and create the basic window structure:

def main(): root () root.title('Python Word Highlighter') ('60400') # Create a text widget to display the text text_widget tk.Text(root, wrap'word', width80, height20) text_(fill'both', expandTrue)

Highlighting Words Ending with 'python'

The core of the functionality we are interested in is highlighting words ending with 'python'. To accomplish this, we will use the highlight_text() function. This function will find, highlight, and update any words ending with 'python' in the text widget.

def highlight_text(text_widget, keyword): # Clear any previously highlighted text excerpt_index f'1.0 {len(keyword) 1}c' text_widget.tag_remove('highlight', excerpt_index, 'end') # Get the end index for the keyword end_index f'1.0 {len(keyword)}c' # Search for the keyword at the beginning of each word until the end while True: start_pos text_(keyword, '1.0', stopindextk.END) if not start_pos: break # Get the word at the start position end_pos f'{start_pos} {len(keyword)}c' word text_(start_pos, end_pos) # Check if the word ends with 'python' if word.endswith('python'): text_widget.tag_add('highlight', start_pos, end_pos) # Get the next word position to search start_pos end_pos end_pos f'{start_pos} {len(keyword)}c'

Integrating the Functionality

Once the highlight_text() function is defined, we need to bind a button in the Tkinter application to trigger the highlighting process. This can be done with a command associated with a button widget.

# Add a button to trigger the highlighting highlight_button tk.Button(root, text'Highlight', commandlambda: highlight_text(text_widget, 'python')) highlight_(side'bottom')

Using the Text Widget

To use the text widget, you can populate it with any text content. This can be done from within the Tkinter environment or by prompting the user to input text via a simple dialog box.

text_(tk.END, """ Sample Python code here. This is a sample text manually inserted for demonstration purposes. Python keyword should be highlighted wherever it appears, especially when ending with 'python'. """)

Executing the Application

After creating the text widget, adding the button for highlighting, and populating the text with some content, we can run the entire application. Make sure to add the call to the main() function to ensure the Tkinter application starts when the script is executed:

if __name__ "__main__": main() ()

Conclusion

By following these steps, you have successfully created a Python Tkinter application that can highlight words ending with 'python'. This simple application is a valuable tool for developers and requires minimal effort to set up. Feel free to modify and enhance this code to suit your specific needs.

Frequently Asked Questions (FAQs)

Q: Can I change the keyword to highlight?

Yes, you can easily modify the keyword in the highlight_text() function. Simply change the 'python' parameter to any other word or string you wish to highlight.

Q: Is the highlighting permanent or can it be removed?

The highlighting is not permanent and can be removed manually using the Tkinter interface. Additionally, you can modify the highlight_text() function to include a method for removing all tags if desired.

Q: Can I highlight multiple keywords at once?

Although this example only highlights one keyword, you can extend the functionality to highlight multiple keywords by calling the highlight_text() method multiple times with different keywords.

Keywords

Python Tkinter Highlight Words Text Widget