The code from my video on how to bind to various widgets in Tkinter (with comments)

TkinterBinding.py

# the Link to my youtube video https://www.youtube.com/watch?v=vBzoLCKQi8U

import tkinter as tk
import webbrowser
from tkinter import ttk


def open_link(event):
    """Opens the URL on a treeview row in a new browser"""
    selected_row = treeview_urls.selection()
    try:
        row_url = treeview_urls.item(selected_row, "values")[1]
        print(f"Going to {row_url}")
        webbrowser.open_new_tab(row_url)
    except IndexError:
        print("Invalid row selected")


def delete_row(event):
    """Deletes the selected row of a treeview"""
    selected_row = treeview_urls.selection()
    if selected_row:
        treeview_urls.delete(selected_row[0])


def display_full_name(event):
    """Displays the entries in the first and last name boxes"""
    first_name = ent_first_name.get()
    last_name = ent_last_name.get()
    label_full_name["text"] = f"{first_name} {last_name}"


def search_website(event):
    """Goes to the website"""
    website_name = search_box.get().lower()
    url = f"www.{website_name}.com"
    print(f"Going to {url}")
    webbrowser.open_new_tab(url)


root = tk.Tk()  # intialises the Tkinter GUI

root.geometry("850x500")  # sets the root window dimenstions to 850w, 500h

# Label Frames
frame_treeview = tk.LabelFrame(root, text="Learning Resources")
frame_treeview.place(relheight=0.5, relwidth=0.7)
frame_search = tk.LabelFrame(root, text="Search Box")
frame_search.place(relx=0.71, relheight=0.5, relwidth=0.25)

# Search Widgets
search_box = ttk.Entry(frame_search, text="")
search_box.pack()
btn_site = tk.Button(frame_search, text="Go to Site")
btn_site.pack()

# Name Display Widgets
ent_first_name = ttk.Entry(frame_search, text="")
ent_first_name.pack()
ent_last_name = ttk.Entry(frame_search, text="")
ent_last_name.pack()
label_full_name = ttk.Label(frame_search)
label_full_name.pack()

# Treeview Widget
treeview_urls = ttk.Treeview(frame_treeview)
treeview_urls.place(relheight=1, relwidth=1)
treescrolly = tk.Scrollbar(frame_treeview, orient="vertical",
                           command=treeview_urls.yview)
treescrollx = tk.Scrollbar(frame_treeview, orient="horizontal",
                           command=treeview_urls.xview)
treeview_urls.configure(xscrollcommand=treescrollx.set,
                        yscrollcommand=treescrolly.set)
treescrollx.pack(side="bottom", fill="x")
treescrolly.pack(side="right", fill="y")

# Grouping for treeview
treeview_urls.insert(parent="", index="end", iid="education", text='Education')

# Populating the treeview with data
rows = (("Codewars", "www.codewars.com"),
        ("PythonSpot", "www.pythonspot.com/beginner/"),
        ("Reddit", "www.reddit.com/r/learnpython"))
header = ("Website Name", "URL")
treeview_urls["column"] = header
for column in treeview_urls["columns"]:
    treeview_urls.heading(column, text=column)

for row in rows:
    treeview_urls.insert(parent="education", index="end", values=row)

# Bindings
# <KeyRelease>: execute method when a key is released
# <Button-1>: execute method when the left mouse button is clicked once
# <Double-1>: execute method when the left mouse button is clicked twice
# <Button-3>: execute method when the right mouse button is clicked once.
ent_first_name.bind("<KeyRelease>", display_full_name)
ent_last_name.bind("<KeyRelease>", display_full_name)
btn_site.bind("<Button-1>", search_website)
treeview_urls.bind("<Double-1>", open_link)
treeview_urls.bind("<Button-3>", delete_row)

root.mainloop()  # An infinite loop to keep the GUI running