make a window tkinter

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

#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 :)