[Python] Confused by root vs self.root and the use of __init__. Also confused with definitions...

first:

from tkinter import *


self.root = Tk()
self.root.configure(bg="red", padx=10, pady=10)
self.root.title("WELCOME- PLEASE LOGIN)")

name = Label(self.root, text="Name:", bg="magenta")
password = Label(self.root, text="Password", bg="magenta")
nameentry = Entry(self.root)
passwordentry = Entry(self.root)

name.grid(row=0, sticky=E)
password.grid(row=1, sticky=E)
nameentry.grid(row=0, column=1)
passwordentry.grid(row=1, column=1)

mainloop()


error on this code ( Traceback (most recent call last): File "/Users/me/pythonfolder/frametest.py", line 4, in self.root = Tk() NameError: name 'self' is not defined)

A window opens but is blank.

Next:

from tkinter import *


root = Tk()
root.configure(bg="red", padx=10, pady=10)
root.title("WELCOME- PLEASE LOGIN)")

name = Label(root, text="Name:", bg="magenta")
password = Label(root, text="Password", bg="magenta")
nameentry = Entry(root)
passwordentry = Entry(root)

name.grid(row=0, sticky=E)
password.grid(row=1, sticky=E)
nameentry.grid(row=0, column=1)
passwordentry.grid(row=1, column=1)

mainloop()


This works fine.

Why is using self.root causing an error vs just root?

Also:

from tkinter import *


def __init__(self, Event= None):

root = Tk()
root.configure(bg="red", padx=10, pady=10)
root.title("WELCOME- PLEASE LOGIN)")

name = Label(root, text="Name:", bg="magenta")
password = Label(root, text="Password", bg="magenta")
nameentry = Entry(root)
passwordentry = Entry(root)

name.grid(row=0, sticky=E)
password.grid(row=1, sticky=E)
nameentry.grid(row=0, column=1)
passwordentry.grid(row=1, column=1)

mainloop()


Causes this error using init: AttributeError: 'NoneType' object has no attribute 'tk' Using self.root in place of root causes the same error. Removing event= None also causes this error.

Basically, I am confused on self.root vs root, definitions and their errors, and classes.

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