How do I bind the escape key to close this window

Question

I have a little program that I've cobbled together to download patents. I'd like to bind the escape key to a function to close the window, but I don't really know how to make this happen. I've bound the escape key to a "quit" function, but can someone help me figure out how to write the function to close the text input window?

I'm a noob.

from Tkinter import *
import urllib

master = Tk()
e = Entry(master)
e.pack()

e.focus_set()


def patdload(self, event=None): 
    allnums = e.get()
    index = 0
    test = allnums.find('.')
    if test > 0:
        sep = 0
        while sep != -1:
            sep = allnums.find('.', index) 
            if sep != -1:
                patno = allnums[index:sep]
            elif sep == -1:
                patno = allnums[index:]

            #patno = e.get()
            paturl = "http://patentimages.storage.googleapis.com/pdfs/US" + patno + ".pdf"
            urllib.urlretrieve (paturl, (patno + ".pdf"))
            index = sep + 1


    else:
        patno = e.get()
        paturl = "http://patentimages.storage.googleapis.com/pdfs/US" + patno + ".pdf"
        urllib.urlretrieve (paturl, (patno + ".pdf"))


def quit #help#:

master.bind('<Return>', patdload)

master.bind('<Escape>',quit)



#b = Button(master, text = "GET", width = 10, command = patdload)
#b.pack()


mainloop()

Edit: here's the new error:

Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python27\lib\lib-tk\Tkinter.py", line 1532, in __call__
return self.func(*args)
File "C:\Python27\PatentGet.py", line 42, in <lambda>
master.bind('<Escape>', lambda x: close())
File "C:\Python27\PatentGet.py", line 39, in close
master.widthdraw() # if you want to bring it back
File "C:\Python27\lib\lib-tk\Tkinter.py", line 1894, in __getattr__
return getattr(self.tk, attr)
AttributeError: widthdraw

Answer 1

First of all, quit is a built-in method so I'd use another name. Otherwise, here's the function:

import sys

def close(event):
    master.withdraw() # if you want to bring it back
    sys.exit() # if you want to exit the entire thing

master.bind('<Escape>', close)

Answer 2

You can use destroy() method within lambda expression to safely exit. I have used in python 3.7.x.

import tkinter as tk
root = tk.Tk()
root.bind("<Escape>", lambda x: root.destroy())
root.mainloop()