Reset Button to Delete user inputs


Tkinter Reset Button to remove user inputs


winfo_children() : Returns the list of all child widgets.
isinstance() : Checks if input object is instance of the given class.

Entry widget

We can clear data from all the entry widgets present in the application.
We are using winfo_children() to get the list of all child classes and then checking if the widget is an Entry class or not by using isinstance().
Irrespective of number of Entry widgets used, we are removing data from all.
for widget in my_w.winfo_children():
        if isinstance(widget, tk.Entry):  # If this is an Entry widget 
            widget.delete(0,'end') # Delete all entries 

Combobox

Inside the above for loop, we will add the code to reset the Combobox. Note that here Combobox is a instance of ttk( Not tk ).
        if isinstance(widget,ttk.Combobox):
            widget.delete(0,'end')

Text

We use text widgets for multi-line text entries. Here is the code to remove all data from all the Text widgets of the application.
for widget in my_w.winfo_children():
        if isinstance(widget, tk.Text):  # If this is an Entry widget 
            widget.delete(0,'end') # Delete all entries 

Checkbutton

We can un-check the checkbuttons by using deselect().
        if isinstance(widget,tk.Checkbutton):
            widget.deselect()

Radiobutton

To reset a set of Radiobuttons we have to update the value of variables to None
if isinstance(widget,tk.Radiobutton):
    my_r.set(None)
Tkinter Reset button to remove all user input data and selections from widgets by winfo_children()


Full code is here
import tkinter as tk # Python 3
from tkinter import ttk
my_w = tk.Tk() # Parent window 
my_w.geometry("415x300") # width and hight of the window 
def my_reset():
    for widget in my_w.winfo_children():
        if isinstance(widget, tk.Entry): # If this is an Entry widget class
            widget.delete(0,'end')   # delete all entries 
        if isinstance(widget,ttk.Combobox):
            widget.delete(0,'end') 
        if isinstance(widget,tk.Text):
            widget.delete('1.0','end') # Delete from position 0 till end 
        if isinstance(widget,tk.Checkbutton):
            widget.deselect()
        if isinstance(widget,tk.Radiobutton):
            my_r.set(None)
       
        #print(widget.winfo_class()) # List of classes 
l1=tk.Label(my_w,text='First Name',font=28)
l1.grid(row=0,column=0,padx=10,pady=10)

e1=tk.Entry(my_w,font=28)
e1.grid(row=0,column=1,padx=10,pady=10)

l1=tk.Label(my_w,text='Last Name',font=28)
l1.grid(row=1,column=0,padx=10,pady=10)

e1=tk.Entry(my_w,font=28)
e1.grid(row=1,column=1,padx=10,pady=10)

months=['Jan','Feb','Mar','Apr','May','Jun'] # List for Combobox values 
cb1 = ttk.Combobox(my_w, values=months,width=7)
cb1.grid(row=2,column=1,padx=10,pady=20)

t1 = tk.Text(my_w,  height=3, width=20,bg='yellow')#  one text box
t1.grid(row=3,column=0,columnspan=2) 

ck1=tk.Checkbutton(my_w,text='I Agree',font=18)
ck1.grid(row=4,column=0)
ck2=tk.Checkbutton(my_w,text='Newsletter',font=18)
ck2.grid(row=4,column=1)

my_r=tk.StringVar()
r2 = tk.Radiobutton(my_w, text='year1',value=1,variable=my_r)
r2.grid(row=5,column=0,padx=5) 
r3 = tk.Radiobutton(my_w, text='year2',value=2,variable=my_r)
r3.grid(row=5,column=1,padx=5)
my_r.set(2)

b1=tk.Button(my_w,text='Submit',font=22)
b1.grid(row=6,column=0,padx=10,pady=10)
b2=tk.Button(my_w,text='Reset',font=22,bg='lightpink',command=lambda:my_reset())
b2.grid(row=6,column=1,padx=10,pady=10)
my_w.mainloop()
Dynamic Buttons handling
Images used over button to create ON / Off switch
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