Python Tkinter Text Editor - Open and Save Text Files

Python Tkinter Events and Event Handling: Exercise-8 with Solution

Write a Python program that creates a text editor with Tkinter that opens a file dialog to open and edit text files. Implement event handling to save changes when a "Save" button is clicked.

Sample Solution:

Python Code:

import tkinter as tk
from tkinter import filedialog

# Function to open a text file and load its content into the Text widget
def open_file():
    file_path = filedialog.askopenfilename(filetypes=[("Text Files", "*.txt")])
    if file_path:
        with open(file_path, "r") as file:
            text_widget.delete("1.0", tk.END)  # Clear the Text widget
            text_widget.insert(tk.END, file.read())  # Insert file content

# Function to save the content of the Text widget to a text file
def save_file():
    file_path = filedialog.asksaveasfilename(defaultextension=".txt", filetypes=[("Text Files", "*.txt")])
    if file_path:
        with open(file_path, "w") as file:
            file.write(text_widget.get("1.0", tk.END))  # Write Text widget content to file

# Create the main window
root = tk.Tk()
root.title("Text Editor")

# Create a Text widget for text editing
text_widget = tk.Text(root, wrap=tk.WORD)
text_widget.pack(fill=tk.BOTH, expand=True)

# Create a "Open File" button to load a text file
open_button = tk.Button(root, text="Open File", command=open_file)
open_button.pack(side=tk.LEFT, padx=5, pady=5)

# Create a "Save" button to save changes to the file
save_button = tk.Button(root, text="Save", command=save_file)
save_button.pack(side=tk.LEFT, padx=5, pady=5)

# Start the Tkinter main loop
root.mainloop()

Explanation:

In the exercise above -

• Import the "tkinter" and "filedialog" modules.
• Define two functions:
• open_file: Opens a file dialog to select and open a text file. It reads the file's content and inserts it into the Text widget.
• save_file: Opens a file dialog to select a save location and saves the Text widget content to a text file.
• Create the main window and set its title.
• Create a Text widget (text_widget) for text editing, which allows text to be wrapped around word boundaries.
• Create an "Open File" button that, when clicked, calls the "open_file()" function to load a text file.
• Create a "Save" button that, when clicked, calls the "save_file()" function to save changes to the file. The 'defaultextension' option ensures that the file is saved with a ".txt" extension by default.
• Finally, start the Tkinter main loop with "root.mainloop()".

Output:

Flowchart:

Python Code Editor:

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