class ChangingCanvas(tk.Canvas):
    def __init__(self,parent,**kwargs):
        tk.Canvas.__init__(self,parent,**kwargs)
        self.bind("<Configure>", self.resize)
        self.height = self.winfo_height()
        self.width = self.winfo_width()

    def resize(self,event):
        self.width = event.width
        self.height = event.height
        print(self.width, self.height,self.winfo_height())
        self.config(width=self.width, height = self.height)

class Application(tk.Frame):
    def __init__(self,master=None):
        tk.Frame.__init__(self,master)
        self.grid()
        self.createWidgets()

    def createWidgets(self):
        self.canvas = ChangingCanvas(self,highlightthickness=0)
        self.canvas.grid(column=1,row=1)