Récupérer valeur Entry

tk.Entry

# -*- coding: utf-8 -*-
"""@author: ****"""
import datetime
from tkinter import *
from time import strftime
import locale
import locale

locale.setlocale(locale.LC_ALL, 'fr_FR')

master = Tk()

annee = champNom.get()

master.title("Tableau de bord")  # Nom de la fenêtre
master.geometry("600x200")  # Dimentions de la fenêtre


def createWin4():
    win4 = Toplevel(master)
    win4.title("Selection Année")

    win4.geometry("150x100")
    win4.iconbitmap("gdata_icon.ico")
    win4.config(background='#5D6D7E')

    def action():
        lblResultat['text'] = champNom.get()

    ok = Button(win4, text="Valide", command=action)

    btn_quit = Button(win4, text="Quitter", command=win4.destroy)
    btn_quit.place(x=80, y=70)
    lbl_ent_an = Label(win4, text="Entrer Année", font='Arial 15', fg='WHITE', bg='#5D6D7E')
    lbl_ent_an.place(x=10, y=0)
    champNom = Entry(win4)
    lblResultat = Label(master, text="", font='Arial 35', relief=FLAT)
    champNom.place(x=10, y=40)
    lblResultat.place(x=300, y=25)
    ok.place(x=15, y=70)


btn_select_annee = Button(master, text="Année :", command=createWin4, font='Arial 30', relief=RAISED)
btn_select_annee.place(x=100, y=20)
j_1 = datetime.datetime(annee, 1, 1).strftime('%A %d %B')  # Jour de l'an
lbl1 = Label(master, text=j_1, font='Arial 20')
lbl1.place(x=50, y=150)

master.mainloop()