#coding:utf-8
import tkinter

def show_infos(*args):
    print("LOGIN : {}".format(login_entry_var.get()))
    print("PASSWORD : {}".format(password_entry_var.get()))

app = tkinter.Tk()
app.geometry("320x140")

login_entry_var = tkinter.StringVar()
login_entry = tkinter.Entry(app, textvariable=login_entry_var)

password_entry_var = tkinter.StringVar()
password_entry = tkinter.Entry(app, textvariable=password_entry_var, show="*")

connection_button = tkinter.Button(app, text="Connexion", command=show_infos)

login_entry.pack()
password_entry.pack()
connection_button.pack()

app.mainloop()