Python tkinter

from tkinter import *
import webbrowser

def open_lw_channel():
    webbrowser.open_new("https://www.youtube.com/channel/UCuzik2022WtVo8s3H5LpK5A")

# Creer une 1ere fenetre
window = Tk()
top = Toplevel(window)

# Personnaliser top
top.title("Inscription")
top.geometry("1080x720")
top.minsize(480, 360)
top.configure(bg='dark blue')

def update_observer(*args):
   if var_gender.get():
      var_label_gender.set("Vous êtes un homme  !")
   else:
        var_label_gender.set("Vous êtes une femme  !")


# Personnaliser window
window.title("Lose Weight")
window.geometry("1080x720")
window.minsize(480, 360)
window.configure(background='dark blue')


# TopLevel
def Ouvrir_inscription(master=None):
    top = Toplevel()
    top.title("S'inscrire")
    top.geometry('1080x720')
    top.configure(bg='dark blue')
    label = Label(top, text="S'INSCRIRE", font=('Verdana', 30, 'bold italic underline'), fg='cyan', bg='dark blue')
    label.pack()

def Ouvrir_Questionnaire():
    top2 = Toplevel()
    top2.title("Questionnaire")
    top2.geometry('1080x720')
    top2.configure(bg='dark blue')
    label2 = Label(top2, text="REPONDEZ AU QUESTIONNAIRE" ,font=('Verdana', 30, 'bold italic underline'), fg='cyan', bg='dark blue')
    label2.pack()

def Ouvrir_Programme():
    top3 = Toplevel()
    top3.title("Mon Programme")
    top3.geometry('1080x720')
    top3.configure(bg='dark blue')
    label3 = Label(top3,text="MON PROGRAMME", font=('Verdana', 30, 'bold italic underline'), fg='cyan', bg='dark blue')
    label3.pack()

# BoutonYT
Yt_btn = Button(top, text="Ouvrir Youtube", font=('Verdana', 30, 'bold italic underline'), fg='dark blue', bg='cyan', command=open_lw_channel)



# Creer un menu
mainmenu = Menu(window)

first_menu = Menu(mainmenu)
first_menu.add_command(label="Inscription", command=Ouvrir_inscription)
first_menu.add_command(label="Questionnaire", command=Ouvrir_Questionnaire)
first_menu.add_command(label="Mon Programme", command=Ouvrir_Programme)

second_menu = Menu(mainmenu)
second_menu.add_command(label="Reponse1")
second_menu.add_command(label="Reponse2")

thirst_menu = Menu(mainmenu)
thirst_menu.add_command(label="Quitter...", command=window.destroy)

mainmenu.add_cascade(label="Commencer", menu=first_menu)
mainmenu.add_cascade(label="Finir", menu=second_menu)
mainmenu.add_cascade(label="Parametres", menu=thirst_menu)


# Widgets
var_gender = IntVar()
var_gender.trace("w", update_observer)
radio1 = Radiobutton(top, text="Homme", value=1, variable=var_gender, bg='dark blue', fg='powder blue', font=(20))
radio2 = Radiobutton(top, text="Femme", value=0, variable=var_gender ,bg='dark blue',fg='powder blue', font=(20))


var_label_gender = StringVar()
label_gender = Label(top, textvariable=var_label_gender, bg='dark blue', fg='powder blue', font=(25))



# Creer une frame
frame = Frame(window, bg='dark blue', bd=2, relief=RAISED, width=100, height=100)
frame2 = Frame(top, bg='powder blue', bd=2, relief=RAISED)
frame2.pack()


label_top = Label(top, text="Quel est votre sexe ?", bg='dark blue', fg='powder blue', font=('Courrier', 25))
label_top.pack()

# Ajouter un 1er texte
label_title = Label(frame, text="Bienvenue sur Lose Weight !", font=("Helvetica", '40', 'bold italic'), bg='dark blue', fg='white')
label_title.pack()

# Ajouter un second texte
label_subtitle = Label(frame, text="Avant de faire du sport... MANGEZ EQUILIBRÉ!", font=("Helvetica", '18', 'bold'), bg='dark blue', fg='white')
label_subtitle.pack()

# Ajouter
frame.pack(expand=YES)

# Affichage

radio1.pack()
radio2.pack()
label_gender.pack()
Yt_btn.pack(pady=100)

# Creation barre menu
menu_bar = Menu(window)

# Creer un 1er menu
file_menu = Menu(menu_bar, tearoff=0)

# Afficher
window.config(menu=mainmenu)
window.mainloop()

def Ouvrir_Questionnaire():
    objectifs = -1
    top2 = Toplevel()
    top2.title("Questionnaire")
    top2.geometry('1080x720')
    top2.configure(bg='dark blue')
    label2 = Label(top2, text="REPONDEZ AU QUESTIONNAIRE" ,font=('Verdana', 30, 'bold italic underline'), fg='cyan', bg='dark blue')
    label2.pack()

    question = Label(top2, text="Quel est votre objectif ?" ,font=('Verdana', 20, 'bold italic underline'), fg='cyan', bg='dark blue')
    reponse1 = Radiobutton(top2, text="Perdre du poids", value=0, variable=objectifs, bg='dark blue',fg='pink', font=(16))
    reponse2= Radiobutton(top2, text="Prendre du muscle", value=1, variable=objectifs, bg='dark blue' fg='pink', font=(16))
    question.pack()
    reponse1.pack()
    reponse2.pack()