Python Tkinter directory file list viewer

Python Tkinter Dialogs and File Handling: Exercise-12 with Solution

Write a Python program that prompts the user to select a directory and then lists all the files in that directory using a Treeview widget using Tkinter.

Sample Solution:

Python Code:

import tkinter as tk
from tkinter import filedialog
import os
import tkinter.ttk as ttk

def browse_directory():
    folder_path = filedialog.askdirectory()
    if folder_path:
        current_dir.set(folder_path)
        list_files(folder_path)

def list_files(folder_path):
    for item in tree_view.get_children():
        tree_view.delete(item)
    
    for filename in os.listdir(folder_path):
        if os.path.isfile(os.path.join(folder_path, filename)):
            tree_view.insert("", "end", values=(filename,))

root = tk.Tk()
root.title("File List Viewer")

current_dir = tk.StringVar()

browse_button = tk.Button(root, text="Browse Directory", command=browse_directory)
browse_button.pack(pady=10)

folder_label = tk.Label(root, textvariable=current_dir)
folder_label.pack()

tree_view = ttk.Treeview(root, columns=("Files",), show="headings", selectmode="browse")
tree_view.heading("Files", text="Files in Directory")
tree_view.pack(padx=20, pady=20, fill="both", expand=True)
root.mainloop()

Explanation:

In the exercise above -

• Import "tkinte"r as "tk", "filedialog", and "os" for creating the GUI components, opening the directory dialog, and listing files in the directory.
• Define the "browse_directory()" function, which opens a directory dialog using "filedialog.askdirectory()" function. This dialog allows the user to select a directory. If a directory is selected, it sets the current directory variable current_dir and calls the list_files() function to list the files in the selected directory.
• Define the "list_files()" function, which clears the existing items in the Treeview widget using "tree_view.delete()" function and then lists the files in the selected directory using os.listdir(). It inserts each file into the Treeview widget.
• Create the main Tkinter window, set its title, and create a "Browse Directory" button that calls the "browse_directory()" function when clicked.
• Display the selected folder path using a label.
• Create a Treeview widget with a single column to display a list of files.
• The main event loop, root.mainloop(), starts the Tkinter application.

Sample Output:

Flowchart:

Python Code Editor:

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