Button in one class, methods in another one

[alan9979]

Hi, I spent 2 days trying to solve this little exercice, creating a face with button open or closing his mouth.
I do have 2 questions about this code :

1. I cannot delete the round face to create a closed mouth, line 40 and line 43, python says : AttributeError: 'Button_Can' object has no attribute 'opened_mouth'. How could I make this work ?
   
2. How could I avoid to repeat the circle function on line 17 in the Button_Can Class ?
   
   Thanks for any help that could enlighten my poor coding skills
   
   

   from tkinter import *
   
   class Button_Can(Frame):
   	def __init__(self):
   		Frame.__init__(self)
   		self.larg,self.haut=200,200
   		self.can=Canvas(self.master,width=self.larg,height=self.haut,bg='ivory')
   		self.can.pack()
   		self.b1=Button(self.master,text='Open it !',command=self.openit)
   		self.b2=Button(self.master,text='Close it !',command=self.closeit)
   		self.b1.pack(side=RIGHT)
   		self.b2.pack(side=LEFT)
   	def openit(self):
   		Face.openMouth(self)
   	def closeit(self):
   		Face.closeMouth(self)
   	def circle(self,x, y, r, coul ='black'):
   		"Draw a circle center x,y radius r "
   		self.can.create_oval(x-r, y-r, x+r, y+r, outline=coul)
   
   class Face():
   	def __init__(self,can):
   		self.can=can
   		"Draw a face"
   		can.delete(ALL)
   		cc =[[100, 100, 80, 'red'],[70, 70, 15, 'blue'], 
   		[130, 70, 15, 'blue'],[70, 70, 5, 'black'],
   		[130, 70, 5, 'black'],[44, 115, 20, 'red'], 
   		[156, 115, 20, 'red'],[100, 95, 15, 'purple']] 
   		i =0
   		while i < len(cc):
   			el = cc[i] 
   			self.circle(el[0], el[1], el[2], el[3])
   			i += 1 
   
   	def circle(self,x, y, r, coul ='black'):
   		"Draw a circle center x,y radius r "
   		self.can.create_oval(x-r, y-r, x+r, y+r, outline=coul)
   	def openMouth(self):
   		self.can.delete(self.closed_mouth)
   		self.opened_mouth=self.circle(100, 145, 30, 'purple')
   	def closeMouth(self):
   		self.can.delete(self.opened_mouth)
   		self.closed_mouth=self.can.create_line(80,145,120,145,fill='purple')
   
   A=Button_Can()
   B=Face(A.can)