How to display the label ( text) value dynamically based on combo box selection value ( List box) in Tkinter?

I am new to tkinter application. The below code is working fine. Please help how to implement mentioned features.

The dynamic value should be displayed above clear button or below the combo box ( Used pack is bottom )- Now working

Clear the label value on combo box selection.

 import tkinter as tk
 from tkinter import ttk
 from tkinter import *
 from datetime import datetime
 # root window
 root = tk.Tk()
 root.geometry("500x350")
 root.resizable(False, False)
 root.title('Test')
 # Log Generator in frame
 Generator = tk.Frame(root)
 Generator.pack(padx=10, pady=10, fill='x', expand=True)

 def clear():
     combo.set('')

 # Function to print the index of selected option
 # in Combobox
 def get_log_file_name(*arg):
     date_Value = datetime.now().strftime("%Y_%m_%d_%I%M%S")
     output_file_name_value = "Log_"+date_Value
     if var.get() == "apple":
             Label(Generator, text="The value at index: "+output_file_name_value+".txt", font=('Helvetica 12')).pack()
     else:
             Label(Generator, text="The value at index: "+output_file_name_value+".html", font=('Helvetica 12')).pack()

 # Define Tuple of months
 months = ('apple','banana')

 # Create a Combobox widget

 label = ttk.Label(Generator, text="Selection_Option:",font=('Helvetica', 10, 'bold'))
 label.pack(fill='x', expand=True)
 var = StringVar()
 combo = ttk.Combobox(Generator, textvariable=var)
 combo['values'] = months
 combo['state'] = 'readonly'
 combo.pack(padx=5, pady=5)

 # Set the tracing for the given variable
 var.trace('w', get_log_file_name)

 # Create a button to clear the selected combobox 
 # text value
 button = Button(Generator, text="Clear", command=clear)
 button.pack(side=left)

 # Make infinite loop for displaying app on 
 # the screen
 Generator.mainloop()

Solution

The dynamic value should be displayed above clear button

The second label could be outside of get_log_file_name() function.

And also configure inside function. So you don't do duplicate Label widget, naming Label2

Also the pack() must be split to prevent an error.

To clear Label2 use .configure(text='')

We will be using ttk. So don't do this from tkinter import *

Code:

import tkinter as tk
from tkinter import ttk
from datetime import datetime


root = tk.Tk()
root.geometry("500x350")
root.resizable(False, False)
root.title('Test')
 
Generator = tk.Frame(root)
Generator.pack(padx=10, pady=10, fill='x', expand=True)

def clear():
    label2.configure(text='')

 
def get_log_file_name(*arg):
    date_Value = datetime.now().strftime("%Y_%m_%d_%I%M%S")
    output_file_name_value = "Log_"+date_Value
    if var.get() == "apple":
        label2.configure(text="The value at index: "+output_file_name_value+".txt", font=('Helvetica 12')) 
    else:
        label2.configure(text="The value at index: "+output_file_name_value+".html", font=('Helvetica 12'))

# Define Tuple of months
months = ('apple','banana')

# Create a Combobox widget
label2 = ttk.Label(Generator)
label2.pack()

label = ttk.Label(Generator, text="Selection_Option:",font=('Helvetica', 10, 'bold'))
label.pack(fill='x', expand=True)

var = tk.StringVar()
combo = ttk.Combobox(Generator, textvariable=var)
combo['values'] = months
combo['state'] = 'readonly'
combo.pack(padx=5, pady=5)

# Set the tracing for the given variable
var.trace('w', get_log_file_name)

# Create a button to clear the selected combobox 
# text value
button = ttk.Button(Generator, text="Clear", command=clear)
button.pack(side='left')

# Make infinite loop for displaying app on 
# the screen
Generator.mainloop()

Screenshot for apple:

Screenshot for banana:

Screenshot to clear Label2: