Struggling to return integer from a Tk Program

[Peter Abel]

morden <morden at shadows.net> wrote in message news:<b029ub$7lg$1 at bob.news.rcn.net>...
> I run this code:
> 
> 
> from Tkinter import *
> import string
> 
> retval = [-1]
> 
> class ThreeButtons:
> 	title = "???"
> 
>          def __init__(self, master, textbody, but1, but2, but3=None, 
> title=None):
>              if title is None: title = self.title
>              self.master = master
> 
>              self.top = Toplevel(master)
>              self.top.title(title)
>              self.top.iconname(title)
> 
>              Label(self.top, text=textbody).pack(side=TOP, fill=X, 
> expand=1, pady=20)
> 
>              upos,text=self.underlinepos(but1)
>              Button(self.top, {'text':text, 'command':self.yes, \
>                                Pack:{'side':'left', 'padx':'20', 
> 'pady':'20'}}, underline=upos )
> 
>              upos,text=self.underlinepos(but2)
>              Button(self.top, {'text':text, 'command':self.no, \
>                                Pack:{'side':'left', 'padx':'20', 
> 'pady':'20'}}, underline=upos )
>              self.top.bind('<Alt-n>', self.no)
> 
>              if but3 is not None:
>                  upos,text=self.underlinepos(but3)
>                  Button(self.top, {'text':text, 
> 'command':self.cancel_command, \
>                                    Pack:{'side':'left', 'padx':'20', 
> 'pady':'20'}}, underline=upos )
> 
>              self.top.bind('<Alt-c>', self.cancel_command)
> 
>              self.top.bind('<Alt-w>', self.cancel_command)
>              self.top.bind('<Alt-W>', self.cancel_command)
>              self.top.bind('<Alt-F4>', self.cancel_command)
>              self.top.protocol('WM_DELETE_WINDOW', self.cancel_command)
>              self.master.mainloop()
> 
>          def droptilda(self, str):
>              comps = string.split( str, '~' )
>              res = comps[0]
>              if(len(comps)>1):
>              	res += comps[1]
>              return res
> 
>          def underlinepos(self, str):
>              comps = string.split( str, '~' )
>              if(len(comps)<=1):
>                  return -1, comps[0];
>              if(len(comps)>2):
>              	# two tildas??????
>                  noop=1
>              #print "len is %d %d\r" % ( len(comps), len(comps[0]) )
>              return len(comps[0]), comps[0]+comps[1]
> 
>          def yes(self, event=None): self.quit(self, 0)
>          def no(self, event=None): self.quit(self, 1)

>          def cancel_command(self, event=None): self.quit(self, 2)
???=============================================== 1        2    3
???---Here you try to call quit with the 3 paras (self,    self, 2)

> 
>          def ok_event(self, event):
>              ok_command()
> 
>          def ok_command(self):
>              quit()
> 

> 	def quit(self, ret_val, how=None):
??? calling quit(self, self   ,  2)

>              how = how


>              rv = int(ret_val)
??? you try to convert "self" to an "int"


>              retval[0] = rv
>              print "%d\r" % retval[0]
>              self.master.quit()              # Exit mainloop()
> 
> def ThreeButtonDriver(root, body, first, second, third, title):
>      ThreeButtons(root, body, first, second, third, title)
>      print "%s\r" % retval[0]
>      return retval
> 
> """Simple test program."""
> root = Tk()
> root.withdraw()
> ThreeButtonDriver(root, "Body of the message\non two lines", "Yes", 
> "~No", "Can~cel", "Sample YesNoMsg Window")
> 
> 
> 
> And get this trace:
> python ./yesmsg.py
> Exception in Tkinter callback
> Traceback (most recent call last):
>    File "/usr/local/lib/python2.2/lib-tk/Tkinter.py", line 1292, in __call__
>      return apply(self.func, args)
>    File "./yesmsg.py", line 59, in no
>      def no(self, event=None): self.quit(self, 1)
>    File "./yesmsg.py", line 70, in quit
>      rv = int(ret_val)
> AttributeError: ThreeButtons instance has no attribute '__int__'
> 
> upon pressing the second button (~No). Replacing int(ret_val) with 
> ret_val on line             rv = ret_val
> results in the same trace
> 
> Is there an easier way to get the number of selected button out of the 
> Tkinter script?
> 
> I plan to extend the interpreter with ThreeButtonDriver and use that for 
> modal dialogs in the program (the rest of the gui is in Zinc on top of 
> Motif).
> 
> How could I place the dialog in the cetner of the root X Window? Should 
> I use placer for that?
> 
> I would appreciate any comments on how I could deuglify this script a bit.

See my remarks with ??? in your code
concerning the error.

Tkinter problems no answer.