Python Forum

Hi,I'm still confuse how multiple class interact between eachother, undestanding why in the following code, you can create a line but not delete it would help.
When I click butB, nothing happens, could anyone tell me why ? Thanks

from tkinter import *

class FaceDom(object):
	def __init__(self, can):
		self.can =can
		self.redline=self.can.create_line(10, 10, 90, 90, fill ='red',width=5)
	
class Projet(Frame):
	def __init__(self, larg, haut):
		Frame.__init__(self)
		self.larg, self.haut = larg, haut
		self.can = Canvas(self, bg='dark green', width =larg, height =haut)
		self.can.pack()
		bList = [("ligne", self.butA),("Delete",self.butB)]
		for b in bList:
			Button(self, text =b[0], command =b[1]).pack()
		self.pack()

	def butA(self):		
		self.x=FaceDom(self.can)

	def butB(self):
		self.can.delete(self.x)
		
Projet(100, 100).mainloop()

when the line was created its id was stored as an attribute redline of an instance of FaceDom
change

self.can.delete(self.x)

to

self.can.delete(self.x.redline)

Thanks, I don't understand yet. So if I don't add "self.readlin=..", how can it be deleted ?

from tkinter import *

class FaceDom(object):
	def __init__(self, can):
		self.can =can
		self.can.create_line(10, 10, 90, 90, fill ='red',width=5)
	
class Projet(Frame):
	def __init__(self, larg, haut):
		Frame.__init__(self)
		self.larg, self.haut = larg, haut
		self.can = Canvas(self, bg='dark green', width =larg, height =haut)
		self.can.pack()
		bList = [("ligne", self.butA),("Delete",self.butB)]
		for b in bList:
			Button(self, text =b[0], command =b[1]).pack()
		self.pack()

	def butA(self):		
		self.x=FaceDom(self.can)
		print(self.x)

	def butB(self):
		self.can.delete(self.x)
		
Projet(100, 100).mainloop()

IS this homework? You have asked a few questions with similar tasks but slightly different code.

Yes,homework, following exercices in a book to learn Python

---

Ok, so I'll use id then
thanks