from guizero import App, TextBox, PushButton, Text, info
app = App()

def btn_go_clicked():
    if txt_password.value == txt_password2.value:
        info("OK", "passwords are the same")
    else:
        info("ERROR", "passwords differ")


lbl_password = Text(app, text="Enter password")
txt_password = TextBox(app, hide_text=True)

lbl_password2 = Text(app, text="Repeat password")
txt_password2 = TextBox(app, hide_text=True)

btn_go = PushButton(app, command=btn_go_clicked, text="Done")

app.display()