Bonjour, j'ai un problème avec Kivy.

Bonjour, j'ai un problème avec Kivy. J'ai essayé de faire une calculatrice avancée pour m'amuser et voilà mon code .py et mon code .kv et mon erreur :

le .py :

import kivy
kivy.require('2.0.0')
from kivy.app import App
from kivy.config import Config
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.button import Button
from kivy.uix.label import Label

class Calculatrice(BoxLayout):
    def calculer(self, expression):
        if expression:
            try:
                self.display.text = str(eval(expression))
            except Exception:
                self.display.text = 'Erreur'


    def renitialiser(self, expression):
     if expression:
      self.display.text = ''

class calculatriceApp(App):
 def build(self):
  self.title = 'Calculatrice'

Config.set('graphics', 'width', '250')
Config.set('graphics', 'height', '415')

calculatriceApp().run()

le .kv :

#:import hex kivy.utils.get_color_from_hex

<BouttonGris@Button>:
 font_size: 25
 background_color: 0,0,0,0
 canvas.before:
  Color:
   rgba: hex('#2e2b2b') if self.state == 'normal' else (0,.7,.7,1)
  Ellipse:
   pos: self.pos
   size: 60, 60

<BouttonBlanc@Button>:
 font_size: 25
 background_color: 0,0,0,0
 canvas.before:
  Color:
   rgba: hex('#ffffff') if self.state == 'normal' else (0,.7,.7,1)
  Ellipse:
   pos: self.pos
   size: 60, 60

<BouttonJaune@Button>:
 font_size: 25
 background_color: 0,0,0,0
 canvas.before:
  Color:
   rgba: hex('#ffa20e') if self.state == 'normal' else (0,.7,.7,1)
  Ellipse:
   pos: self.pos
   size: 60, 60

<BouttonRectangle@Button>:
 font_size: 25
 background_color: 0,0,0,0
 canvas.before:
  Color:
   rgba: hex('#2e2b2b') if self.state == 'normal' else (0,.7,.7,1)
  RoundedRedtancle:
   pos: self.pos
   size: 120, 60
   radius: [30,]

Calcutrice:
 id:calculatrice
 display: input
 orientation: 'vertical'

 GridLayout:
  orientation: 'horizontal'
  size_hint: (1, 0.3)
  cols: 1
  rows: 1
  TextInput:
   id: input
   background_color: hex('#000000')
   foreground_color: hex('#ffffff')
   font_size: 30

 GridLayout:
  orientation: 'vertical'
  cols: 4

  BouttonBlanc:
   text: 'C'
   on_press: calculatrice.renitialiser(input.text)
  BouttonBlanc:
   text: '+/-'
   on_press: input.text += self.text
  BouttonBlanc:
   text: '%'
   on_press: input.text += self.text
  BouttonJaune:
   text: '/'
   on_press: input.text += self.text
  BouttonGris:
   text: '7'
   on_press: input.text += self.text
  BouttonGris:
   text: '8'
   on_press: input.text += self.text
  BouttonGris:
   text: '9'
   on_press: input.text += self.text
  BouttonJaune:
   text: '*'
   on_press: input.text += self.text
  BouttonGris:
   text: '4'
   on_press: input.text += self.text
  BouttonGris:
   text: '5'
   on_press: input.text += self.text
  BouttonGris:
   text: '6'
   on_press: input.text += self.text
  BouttonJaune:
   text: '-'
   on_press: input.text += self.text
  BouttonGris:
   text: '1'
   on_press: input.text += self.text
  BouttonGris:
   text: '2'
   on_press: input.text += self.text
  BouttonGris:
   text: '3'
   on_press: input.text += self.text
  BouttonJaune:
   text: '+'
   on_press: input.text += self.text
  BouttonRectangle:
   text: '0'
   on_press: input.text += self.text
  BouttonGris:
   text: ','
   on_press: input.text += self.text
  BouttonJaune:
   text: '='
   on_press: calculatrice.calculer(input.text)

l'erreur :

#:import hex kivy.utils.get_color_from_hex

<BouttonGris@Button>:
	font_size: 25
	background_color: 0,0,0,0
	canvas.before:
		Color:
			rgba: hex('#2e2b2b') if self.state == 'normal' else (0,.7,.7,1)
		Ellipse:
			pos: self.pos
			size: 60, 60

<BouttonBlanc@Button>:
	font_size: 25
	background_color: 0,0,0,0
	canvas.before:
		Color:
			rgba: hex('#ffffff') if self.state == 'normal' else (0,.7,.7,1)
		Ellipse:
			pos: self.pos
			size: 60, 60

<BouttonJaune@Button>:
	font_size: 25
	background_color: 0,0,0,0
	canvas.before:
		Color:
			rgba: hex('#ffa20e') if self.state == 'normal' else (0,.7,.7,1)
		Ellipse:
			pos: self.pos
			size: 60, 60

<BouttonRectangle@Button>:
	font_size: 25
	background_color: 0,0,0,0
	canvas.before:
		Color:
			rgba: hex('#2e2b2b') if self.state == 'normal' else (0,.7,.7,1)
		RoundedRedtancle:
			pos: self.pos
			size: 120, 60
			radius: [30,]

Calcutrice:
	id:calculatrice
	display: input
	orientation: 'vertical'

	GridLayout:
		orientation: 'horizontal'
		size_hint: (1, 0.3)
		cols: 1
		rows: 1
		TextInput:
			id: input
			background_color: hex('#000000')
			foreground_color: hex('#ffffff')
			font_size: 30

	GridLayout:
		orientation: 'vertical'
		cols: 4

		BouttonBlanc:
			text: 'C'
			on_press: calculatrice.renitialiser(input.text)
		BouttonBlanc:
			text: '+/-'
			on_press: input.text += self.text
		BouttonBlanc:
			text: '%'
			on_press: input.text += self.text
		BouttonJaune:
			text: '/'
			on_press: input.text += self.text
		BouttonGris:
			text: '7'
			on_press: input.text += self.text
		BouttonGris:
			text: '8'
			on_press: input.text += self.text
		BouttonGris:
			text: '9'
			on_press: input.text += self.text
		BouttonJaune:
			text: '*'
			on_press: input.text += self.text
		BouttonGris:
			text: '4'
			on_press: input.text += self.text
		BouttonGris:
			text: '5'
			on_press: input.text += self.text
		BouttonGris:
			text: '6'
			on_press: input.text += self.text
		BouttonJaune:
			text: '-'
			on_press: input.text += self.text
		BouttonGris:
			text: '1'
			on_press: input.text += self.text
		BouttonGris:
			text: '2'
			on_press: input.text += self.text
		BouttonGris:
			text: '3'
			on_press: input.text += self.text
		BouttonJaune:
			text: '+'
			on_press: input.text += self.text
		BouttonRectangle:
			text: '0'
			on_press: input.text += self.text
		BouttonGris:
			text: ','
			on_press: input.text += self.text
		BouttonJaune:
			text: '='
			on_press: calculatrice.calculer(input.text)

Voilà, toute réponse sera acceptée merci ! :)