Re: [Pmw-general] NoneType error (long)

[Eric P. <pe...@cg...>]

A common error, bites me often. If what you had were
	self.ftr_count_btns = Pmw.ButtonBox(...args...)

things would work, but what you have is
	self.ftr_count_btns = Pmw.ButtonBox(...args...).pack(...pack args...)

pack() returns None.

--Eric


On Thursday, July 15, 2004, at 05:03 PM, Faulconer, Steven M. wrote:

> Hello everyone,
>
> I've been tasked to build some graphical interfaces for some command 
> line
> applications we use in our office. The programs are going to run on 
> both
> Windows and Solaris boxes. So far, I've been using Pmw (and Tkinker, of
> course) to build my applications. Everything has been working great 
> until I
> got a little bit more complicated.  In essence, I'm creating a new 
> window
> with a couple Groups that will contain some labels and buttons. The 
> issue
> that comes up is in the code listed below, followed by the error 
> message.
>
> I've gotten the same message when creating solitary Buttons and 
> attempting
> to bind a callback to the button. I'm sure it is something I'm doing. 
> Note,
> this is not the main class of the application, but a second class to 
> handle
> the newly created window (hence the Toplevel call ).
>
> I edited the code and added a print statement to print the type of
> ftr_count_btns, and sure enough, it spits out 'NoneType'. Not sure 
> what I
> did, but any help would be greatly appreciated.
>
> Thanks.
>
> Steven Faulconer
>
> ------- CODE ---------
> class CheckerApp:
>     def __init__( self, parent, project, database ):
>         self.newroot = Tkinter.Toplevel()
>         self.newroot.geometry( "250x400" )
>         self.newroot.resizable( width = False, height = False )
>         self.newroot.option_add( "*Font", "Arial 12" )
>         self.newroot.title( "Checker Front End" )
>         self.newroot.focus_set()
>
>         # Information Group
>         self.info_group = Pmw.Group( self.newroot, tag_text = 
> "Information"
> )
>         self.info_group.pack( pady = 2, padx = 2, expand = 'yes', fill 
> =
> 'both' )
>         proj = Tkinter.Label( self.info_group.interior(),
>                        text = "Project : " + project ).pack( anchor =
> Tkinter.W )
>         data = Tkinter.Label( self.info_group.interior(),
>                        text = "Database : " + database ).pack( anchor =
> Tkinter.W )
>
>         # Feature Count Group
>         self.ftr_count_group = Pmw.Group( self.newroot, tag_text = 
> "Feature
> Counter" )
>         self.ftr_count_group.pack( pady = 2, padx = 2, expand = 'yes', 
> fill
> = 'both' )
>         self.ftr_count_btns = Pmw.ButtonBox( 
> self.ftr_count_group.interior()
> ).pack( fill = 'both',
>
> expand = 'yes',
>
> padx = 5,
>
> pady = 5 )
>         self.ftr_count_btns.add( 'Run Checker', command = 
> self.RunFtrCount )
>         self.ftr_count_btns.add( 'View Report', command =
> self.ViewFtrCountReport )
>
> ------- CODE ---------
>
> ------- ERROR ---------
> Error: 1
> AttributeError Exception in Tk callback
>   Function: <bound method MainApp.DBSelectButton of <__main__.MainApp
> instance at 0x009B2D28>> (type: <type 'instancemethod'>)
>   Args: (<Tkinter.Event instance at 0x012CDE68>,)
>   Event type: ButtonPress (type num: 4)
> Traceback (innermost last):
>   File "C:\Python23\Lib\site-packages\Pmw\Pmw_1_2\lib\PmwBase.py", line
> 1747, in __call__
>     return apply(self.func, args)
>   File "C:\MyStuff\Software\3DC\GUI\main.py", line 133, in 
> DBSelectButton
>     checkerwindow = CheckerApp( self.myparent, self.projmenu.get(),
> self.dblist.getvalue()[ 0 ] )
>   File "C:\MyStuff\Software\3DC\GUI\main.py", line 36, in __init__
>     self.ftr_count_btns.add( 'Run Checker', command = self.RunFtrCount 
> )
> AttributeError: 'NoneType' object has no attribute 'add'
>
> ================================================
>   Event contents:
>     char: ??
>     delta: 0
>     height: ??
>     keycode: ??
>     keysym: ??
>     keysym_num: ??
>     num: 1
>     send_event: False
>     serial: 181
>     state: 8
>     time: 41008750
>     type: 4
>     widget: .19717176
>     width: ??
>     x: 67
>     x_root: 368
>     y: 20
>     y_root: 411
> ------- ERROR ---------
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by BEA Weblogic Workshop
> FREE Java Enterprise J2EE developer tools!
> Get your free copy of BEA WebLogic Workshop 8.1 today.
> http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click
> _______________________________________________
> Pmw-general mailing list
> Pmw...@li...
> https://lists.sourceforge.net/lists/listinfo/pmw-general