Path: csiph.com!news.swapon.de!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: Fri, 04 Mar 2016 23:28:03 +0100
Organization: None
Lines: 93
Message-ID: <mailman.200.1457130500.20602.python-list@python.org>
References: <56e451a3-01f7-4883-b4db-c3a6a10729a9@googlegroups.com> <naimhq$3u4$1@dont-email.me> <539a3e8d-31eb-4199-9c05-03a89b2dab91@googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7Bit
X-Trace: news.uni-berlin.de d4iYNRHmAsX793BG8ehUKQ/I9qNNV0ggNwQAWSqZy1kA==
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.001
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'subject:Python': 0.05; 'default)': 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; 'output': 0.13; 'skip:# 20': 0.13; 'def': 0.13; "skip:' 30": 0.15; '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; 'tk()': 0.16; 'variable.': 0.16; 'wrote:': 0.16; 'variable': 0.18; 'tkinter': 0.22; 'advance.': 0.23; 'this:': 0.23; 'import': 0.24; 'header:User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.26; 'error': 0.27; 'skip:# 10': 0.27; 'function': 0.28; 'values': 0.28; 'looks': 0.29; 'question:': 0.29; 'print': 0.30; 'code': 0.30; 'reported': 0.32; "skip:' 20": 0.34; 'text': 0.35; 'to:addr:python-list': 0.36; 'subject:: ': 0.37; 'thanks': 0.37; 'received:org': 0.37; 'christian': 0.38; 'why': 0.39; 'subject:from': 0.39; 'skip:e 20': 0.39; 'to:addr:python.org': 0.40; 'received:de': 0.40; 'your': 0.60; 'email addr:gmail.com': 0.62; 'matter.': 0.66; 'here': 0.66; 'attention': 0.76; 'others:': 0.84
X-Injected-Via-Gmane: http://gmane.org/
X-Gmane-NNTP-Posting-Host: p57bd9a6f.dip0.t-ipconnect.de
User-Agent: KNode/4.13.3
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.21
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Xref: csiph.com comp.lang.python:104058

kevind0718@gmail.com wrote:

> 
> 
> Christian & Others:
> 
> Thanks for your attention to this matter.
> My code now look like this:
> 
> from Tkinter import *
> 
> 
> def butContinue():
>     dbUser = entryName.get()

Here you set the local variable dbUser (every name you rebind inside a 
function is local to that function by default)

>     pWord =  entryPWord.get()
>     print dbUser

and here you print it.

>     print pWord
>     root1.quit()
> 
> 
> dbUser = ""

Here you set the global variable dbUser

> pWord  = ""
> root1 = Tk()
> ##root1.geometry("500x250")
> 
> 
> lblTop = Label(root1, text= '      Enter Values Below', font="Helvetica
> 14").grid(row=0, column=0, columnspan=2 , pady=5)
> ##lblTop.pack(side = TOP)
> 
> lblDB = Label(root1,    text= 'Weight').grid(row=1, column=0 )
> lblPWord = Label(root1, text= 'Height').grid(row=2,column=0)
> entryName = Entry(root1)
> entryName.grid(row=1, column=1, pady=5)
> 
> entryPWord = Entry(root1)
> entryPWord.grid(row=2, column=1, pady = 5)
> 
> butGo  =  Button(root1, text="   Continue "  , command=butContinue
> ).grid(row=3, column=1, sticky=W, pady=10)
> 
> 
> root1.mainloop()
> 
> print "After the MainLoop"
> print dbUser

and here you print that global variable.

> print pWord
> 
> After I type in the text Weight and Height
> No error are reported and output looks like this:
> 
> Weight
> Height
> After the MainLoop
> 
> 
> Question:
> Why did this code not cause Weight and Height to print again.
> 
> print "After the MainLoop"
> print dbUser
> print pWord
> 
> Thanks in advance.

If you want

> def butContinue():
>     dbUser = entryName.get()
>     pWord =  entryPWord.get()

to change the global dbUser and pWord you need to declare them as global 
explicitly:

> def butContinue():
      global dbUser, pWord
>     dbUser = entryName.get()
>     pWord =  entryPWord.get()