#:kivy!
<RootWidget>:
    txt_inpt: txt_inpt
    orientation:"vertical"
    canvas.before:
        Color:
            rgba: 1, 1, 1, 1
        Rectangle:
            pos: self.pos
            size: self.size
    Label:
        text:"entrer numéros de chaine"
        color:0,0,0,1

    TextInput:
        id: txt_inpt
        row:1
        multiline:False
        focus:True
    Label:
        text: txt_inpt.text
        color:0,0,0,1