Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: Peter Otten <__peter__@web.de> Newsgroups: comp.lang.python Subject: Re: exit from Tkinter mainloop Python 2.7 Date: Tue, 23 Feb 2016 23:45:08 +0100 Organization: None Lines: 41 Message-ID: References: <56e451a3-01f7-4883-b4db-c3a6a10729a9@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Trace: news.uni-berlin.de APwcL3RKq4vhvjyltKMZxQPqYMjPaxU0lwXQ44UbyynQ== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.003 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'root': 0.04; 'subject:Python': 0.05; 'none.': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'subject:2.7': 0.09; 'def': 0.13; 'advice,': 0.16; 'entryname': 0.16; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:io': 0.16; 'received:plane.gmane.org': 0.16; 'received:psf.io': 0.16; 'received:t-ipconnect.de': 0.16; 'subject:Tkinter': 0.16; 'wrote:': 0.16; 'deleted.': 0.18; 'widget': 0.18; 'tkinter': 0.22; 'import': 0.24; 'sort': 0.25; 'header:User-Agent:1': 0.26; "doesn't": 0.26; 'header:X-Complaints-To:1': 0.26; 'error': 0.27; 'values': 0.28; 'print': 0.30; 'window': 0.30; 'entry': 0.31; 'exist': 0.35; 'i.e.': 0.35; 'to:addr:python-list': 0.36; 'subject:: ': 0.37; 'two': 0.37; 'method': 0.37; 'received:org': 0.37; 'christian': 0.38; 'why': 0.39; 'does': 0.39; 'subject:from': 0.39; 'skip:e 20': 0.39; 'to:addr:python.org': 0.40; 'received:de': 0.40; 'some': 0.40; 'close': 0.61; 'export': 0.63; 'grab': 0.64; 'believe': 0.66; 'below.': 0.66; 'therefore': 0.67; 'children.': 0.76; 'click': 0.76; 'gollwitzer': 0.84; 'window,': 0.84 X-Injected-Via-Gmane: http://gmane.org/ X-Gmane-NNTP-Posting-Host: p57bd9d8e.dip0.t-ipconnect.de User-Agent: KNode/4.13.3 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.21rc2 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com comp.lang.python:103423 Christian Gollwitzer wrote: > Am 23.02.16 um 22:39 schrieb kevind0718@gmail.com: >> from Tkinter import * >> >> def butContinue(): >> root1.destroy() >> [...] >> entryName = Entry(root1).grid(row=1, column=1, pady=5) >> [...] >> butGo = Button(root1, text=" Continue " , command=butContinue >> ).grid(row=3, column=1, sticky=W, pady=10) >> >> root1.mainloop() >> >> print entryName.get("1.0", "end-1c" ) > >> When I click on butGo I get the error below. >> So is this some sort of scope error? >> why does entryName not exist for me to grab it's value? > > You call destroy() on the root window of Tk. If you destroy a window, > that will destroy all of it's children. Therefore by deleting the root > window, also the entryName widget was deleted. You need to export the > values before you close the window, i.e. in the butContinue() function. Even when you follow this advice, entryName was set to None by the line >> entryName = Entry(root1).grid(row=1, column=1, pady=5) as grid() always returns None. You need two steps entryName = Entry(root1) entryName.grid(row=1, column=1, pady=5) Also, >> print entryName.get("1.0", "end-1c" ) I believe that the Entry widget's get() method doesn't take any arguments.