[Tutor] Newbie-Getting input from a text entry

[Richard Grosse]

Thanks for your help folks.

Did not realise that the geometry managers did this despite spending the 
past day reading through several  TK/Python docs.  Oh well.

Prompt replies appreciated.

Best Regards

Richard

At 09:22 23/08/02 -0500, you wrote:
>The problem is that the geometry managers (pack, place, and grid) return
>None instead of the object they're acting on. You'll want to instantiate
>your widget,  then grid() it separately:
>
>self.code=Pmw.EntryField(self.root)
>self.grid(row=0, column=1,padx=6, pady=2)
>
>Don
>
>----- Original Message -----
>From: "richard" <python@keep-trying.com>
>To: <tutor@python.org>
>Sent: Friday, August 23, 2002 8:00 AM
>Subject: [Tutor] Newbie-Getting input from a text entry
>
>
> > Greetings,
> >
> > I am trying to retrieve a value from a text box. However I am unable to do
> > so as I cannot
> > find the correct method to retrieve the value. When I run the script the
> > GUI is created fine. The problem occurs when you press the button to
> > retrieve the value. I get an error which I think is saying that the get()
> > method is not valid, however it is what is used in the examples I have
>been
> > looking at and these have worked.  I just do not understand why the value
> > cannot be assigned.
> >
> > Any help appreciated.
> >
> > Richard
> >
> >
> > Error Message:
> >
> > Exception in Tkinter callback
> > Traceback (most recent call last):
> >    File "C:\PYTHON22\lib\lib-tk\Tkinter.py", line 1292, in __call__
> >      return apply(self.func, args)
> >    File "C:\Python22\fmna4.py", line 29, in add
> >      print self.code.get()
> > AttributeError: 'NoneType' object has no attribute 'get'
> >
> > Script:
> >
> > # import modules to be used
> > from Tkinter import *
> > import Pmw
> >
> > class GUI:
> >      def __init__(self):
> > ######################################################################
> >          self.root = Tk()
> >          self.root.title('FMNA - Add/Amend/Delete')
> >          self.root.option_add('*Entry*background',     'lightblue')
> >          self.root.option_add('*font',   ('verdana', 10, 'bold'))
> >
> >          Label(self.root, text='Code').grid(row=0, sticky=W)
> >          self.code=Pmw.EntryField(self.root).grid(row=0, column=1,padx=6,
> > pady=2)
> >
> >          Button(self.root, text='Quit', command=self.quit).grid(row=13,
> > column=0, columnspan=2)
> >          Button(self.root, text='Add', command=self.add).grid(row=13,
> > column=3, columnspan=2)
> >
> >      def quit(self):
> >          import sys
> >          sys.quit
> >
> >      def add(self):
> >          print self.code.get()
> >
> > myGUI = GUI()
> > #myGUI.root.mainloop()
> >
> > -----------------------------------------
> > Python 2.2
> > Platform Win32
> >
> >
> > _______________________________________________
> > Tutor maillist  -  Tutor@python.org
> > http://mail.python.org/mailman/listinfo/tutor