python(OOPS) tkinter button not appearing-CodePudding

i am trying to make a library management system in python using oops and tkinter. here is the code:

from tkinter import *
class library():
    def __init__(self):
        self.screen=Tk()
        self.title='LOGIN'
        self.screen.minsize(800,600)
        self.screen.maxsize(800,600)
        self.screen.title(self.title)
        c=Canvas(self.screen,bg='black').place(x=-10,y=0,height=1000,width=1000)

    def screen_work(self):
        self.screen_login().screen.destroy()
        screen=Tk()
        screen.title('LIBRARY MANAGEMENT')
        #screen.attributes('-fullscreen',True)

    def button(self):
        Button(self.screen,text='press',bg='red').place(x=400,y=300)

    
lib=library()
mainloop()

now ,when i run this program a black screen of dimension '800x600; opens up without any errors but does not show any button.

CodePudding user response：

You don’t really need to use a function to add a button, you may just leave the button code near the end after the other functions. If you want to keep the function, I think you forgot to declare the function in order for the button to appear.

CodePudding user response：

As Bryan Oakley and JRiggles rightly stated, the button function is never called, so it wouldn't display

updated code

from tkinter import *
class library():
    def __init__(self):
        self.screen=Tk()
        self.title='LOGIN'
        self.screen.minsize(800,600)
        self.screen.maxsize(800,600)
        self.screen.title(self.title)
        c=Canvas(self.screen,bg='black').place(x=-10,y=0,height=1000,width=1000)
    
    def screen_work(self):
        self.screen_login().screen.destroy()
        screen=Tk()
        screen.title('LIBRARY MANAGEMENT')
        #screen.attributes('-fullscreen',True)
    def button(self):
        Button(self.screen,text='press',bg='red').place(x=400,y=300)

lib=library()
lib.button()
mainloop()

here's a great resource to learn tkinter in case you're interested! https://realpython.com/python-gui-tkinter/