为什么我不能在框架 tkinter 上放置按钮

Question

from tkinter import *

class page:
    def pageNext(self, pageNext):
        self.pageNext = pageNext
        pageNext.tkraise()
    def button(self, window, text, x, y, command = None):
        self.window = window
        self.text = text
        self.x = x
        self.y = y
        self.command = command
        button = Button(window, text = text, command = lambda:command)
        button.place(x = x, y = y)
    def label(self, window, text, x, y, header = False):
        self.window = window
        self.text = text
        self.x = x
        self.y = y
        self.header = header
        if header == True:
            label = Label(window, font = "Helvetica 16 bold italic", text = text)
        else:
            label = Label(window, text = text)
        label.place(x = x, y = y)
    def newPage(self, window):
        self.window = window
        pageNew = Frame(window)
        pageNew.grid(row = 0, column = 0, sticky = "News")
        return pageNew
root = Tk()
page = page()

Guys when I try to create a frame using pageWelcome = page.newPage(root) and place a button using page.button(pageWelcome) and say page.pageNext(pageWelcome) it doesn't place the button but when I place a button like page.button(root) it places the button to the screen. I can't see which part of my code is broken. Can someone help?

PS: I made this class basing to my first GUI. In that times i couldn't use classes but my code was working fine.

My code

Answer 1

Guys i couldn't find what was wrong with my code so i started for "how to change page tkinter". One of the results was very simple -easy to understand- and i changed all of my code according to that code. I am putting here the tutorial link and the credit link if there is anyone interested.