how to make a tkinter window

from tkinter import *

mywindow = Tk() #Change the name for every window you make
mywindow.title("New Project") #This will be the window title
mywindow.geometry("780x640") #This will be the window size (str)
mywindow.minsize(540, 420) #This will be set a limit for the window's minimum size (int)
mywindow.configure(bg="blue") #This will be the background color

mywindow.mainloop() #You must add this at the end to show the window

from tkinter import Tk, Label, Button

class MyFirstGUI:
    def __init__(self, master):
        self.master = master
        master.title("A simple GUI")

        self.label = Label(master, text="This is our first GUI!")
        self.label.pack()

        self.greet_button = Button(master, text="Greet", command=self.greet)
        self.greet_button.pack()

        self.close_button = Button(master, text="Close", command=master.quit)
        self.close_button.pack()

    def greet(self):
        print("Greetings!")

root = Tk()
my_gui = MyFirstGUI(root)
root.mainloop()

#Creating Tkinter Window In Python:

from tkinter import *

new_window = Tk() #Create a window ; spaces should be denoted with underscores ; every window should have a different name
new_window.title("My Python Project") #Name of screen ; name should be the one which you already declared (new_window)
new_window.geometry("200x150") #Resizes the default window size
new_window.configure(bg = "red") #Gives color to the background

new_window.mainloop() #Shows the window on the screen

#!/usr/bin/python

import Tkinter
top = Tkinter.Tk()
# Code to add widgets will go here...
top.mainloop()

# Python 3.x
import tkinter
top = tkinter.Tk()
# Code to add widgets will go here...
top.mainloop()

# I recommend creating each tkinter window as a child class to a frame.
# This keeps all methods related to the window encapsulated, and makes
# your code alot more understandable and readable :)