Como abrir um Web Browser URL Link?

import webbrowser
new=2
url="https://www.sapo.pt/"

webbrowser.open(url,new=new)

####Atualizado#####

import webbrowser
new=2
site =str(input('Digite um site: '))
url="https://www."+site+"/"

webbrowser.open(url,new=new)


#Outra versão

from tkinter import *
from tkinter import messagebox
import webbrowser

new = 2

root = Tk()
root.geometry("500x300")
root.resizable(0, 0)
root.config(bg="#103030")
root.title("Como abrir um Web Browser URL Link?")

titulo = Label(text="Como abrir um Web Browser URL Link?",
               font=("Arial", "18", "bold"), bg="#103030", fg="#49e3e3")
titulo.place(relx=0.03, rely=0.05)

site_sub1 = Label(text="Site",
                  font=("Arial", "17", "bold"), bg="#103030", fg="#49e3e3")
site_sub1.place(relx=0.45, rely=0.2)

site = StringVar()
site_entrada = Entry(textvariable=site,
                     font=("Arial", "12", "bold"),
                     bg="white", fg="blue", justify='center')
site_entrada.place(relx=0.3, rely=0.35, relwidth=0.45)
site_entrada.focus()


def limpar():
    site_entrada.delete(0, END)


def app():
    s = site.get().strip()  # Remove espaços em branco no início e no fim
    if not s:  # Verifica se a string está vazia após a remoção dos espaços em branco
        messagebox.showerror("Erro", "Por favor, insira um site válido.")
        return
    url = "https://www." + s + "/"

    webbrowser.open(url, new=new)


but1 = Button(text="Mostrar", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'), command=app)
but1.place(relx=0.1, rely=0.55, relwidth=0.25, relheight=0.1)

but_limpar = Button(text="Limpar", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 12, 'bold'), command=limpar)
but_limpar.place(relx=0.4, rely=0.55, relwidth=0.25, relheight=0.1)

but_sair = Button(text="Sair", bd=2, bg='#107db2', fg='white',
                  font=('verdana', 12, 'bold'), command=root.destroy)
but_sair.place(relx=0.7, rely=0.55, relwidth=0.25, relheight=0.1)

root.mainloop()