Hello, In Tkinter, when you want to create a secondary window you do not have to implement a whole new class. What you need to do is just create a new toplevel. Furthermore, never use "globals" within a class.
I made some modifications to your code. You can find the modified version of your code in here: http://paste-it.net/public/hc7b554/ Firat 2010/8/22 Rlain <robert.hed...@mac.com> > > Hi! > I've been working on this app last days, and can't get passed this problem: > I've created two windows, (one is created by a button click in the first > window), and from the other window I want to change some variables defined > in the first window. > > I'm guessing either I haven't understood the whole parent thingy, or messed > up somewhere there. > > The source code is: > (there's some translations and explanations below) > > > #!/usr/bin/python > # -*- coding: utf-8 -*- > > from __future__ import division > import Tkinter > > > class enhetsomvandlare_tk(Tkinter.Tk): > def __init__(self,parent): > Tkinter.Tk.__init__(self,parent) > self.parent = parent > self.initialize() > > > def initialize(self): > self.grid() > > self.LV = Tkinter.StringVar() > label = Tkinter.Label(self,textvariable=self.LV, > anchor="w",fg="white",bg="blue") > label.grid(column=0,row=0,columnspan=1,sticky='EW') > self.LV.set(u"Lbs to Kg") > > global enhet > enhet = "lbstokg" > > > self.entryVariable1 = Tkinter.StringVar() > self.entry = Tkinter.Entry(self,textvariable=self.entryVariable1) > self.entry.grid(column=0,row=1,sticky='W') > self.entry.bind("<Return>", self.OnPressEnter) > self.entryVariable1.set(u"") > > self.entryVariable2 = Tkinter.StringVar() > self.entry = Tkinter.Entry(self,textvariable=self.entryVariable2) > self.entry.grid(column=1,row=1,sticky='W') > self.entry.bind("<Return>", self.OnPressEnter) > self.entryVariable2.set(u"") > > > > raknaknapp = Tkinter.Button(self,text=u"Räkna ut!", > command=self.Onraknaknapp1) > raknaknapp.grid(column=2,row=1) > > Change_units = Tkinter.Button(self,text=u"Change Units", > command=self.OnChange_units) > Change_units.grid(column=1,row=2) > > > self.grid_columnconfigure(0,weight=1) > self.grid_columnconfigure(1,weight=1) > self.grid_columnconfigure(2,weight=1) > self.resizable(True,False) > self.update() > self.geometry(self.geometry()) > > > > > def Onraknaknapp1(self): > if enhet == "lbstokg": > lbs = float(self.entryVariable1.get()) > kg = lbs / 0.455 > self.entryVariable2.set(kg) > > elif enhet == "kgtolbs": > kg = float(self.entryVariable1.get()) > lbs = kg * 0.455 > self.entryVariable2.set(lbs) > > > > def OnChange_units(self): > > class Change_units_tk(Tkinter.Tk): > def __init__(self,parent): > Tkinter.Tk.__init__(self,parent) > self.parent = parent > self.initialize() > > def initialize(self): > self.grid() > > self.LV2 = Tkinter.StringVar() > label = Tkinter.Label(self,textvariable=self.LV2, > > anchor="w",fg="white",bg="blue") > label.grid(column=0,row=0,columnspan=2,sticky='EW') > self.LV2.set(u"Choose Unit...") > > kgtolbs = Tkinter.Button(self,text=u"Kg to lbs", > command=self.Onkgtolbs) > kgtolbs.grid(column=0,row=1) > > lbstokg = Tkinter.Button(self,text=u"Lbs to kg", > command=self.Onlbstokg) > lbstokg.grid(column=1,row=1) > > self.grid_columnconfigure(0,weight=1) > self.grid_columnconfigure(1,weight=1) > self.grid_columnconfigure(2,weight=1) > self.resizable(True,False) > self.update() > self.geometry(self.geometry()) > > def Onkgtolbs(self): > self.LV.set("Kg to lbs") > global enhet > enhet = "kgtolbs" > > def Onlbstokg(self): > self.LV.set("Lbs to kg") > global enhet > enhet = "lbstokg" > > > if __name__ == "__main__": > app = Change_units_tk(enhetsomvandlare_tk) > app.title("What unit?") > > > def OnPressEnter(self,event): > self.LV.set( "Hej" ) > > > > if __name__ == "__main__": > app = enhetsomvandlare_tk(None) > app.title("Robert's Enhetsomvandlare") > app.mainloop() > > > > (Some things are swedish, so I'll translate them to make this easier to > understand) > Legend for my code: > > enhet = unit > LV = Labelvariable > raknaknapp = calculatebutton > Räkna ut = calculate > > > > > > > Now as soon as I get the crossover thing to work I'll start adding more > math, functions and other things to it to make it useful. But right now I > want to get rid of this error message: > > Exception in Tkinter callback > Traceback (most recent call last): > File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__ > return self.func(*args) > File "/home/robert/Desktop/programmering/python/12 enhets > omvandlare/12.py", line 118, in OnChange_units > app = Change_units_tk(enhetsomvandlare_tk) > File "/home/robert/Desktop/programmering/python/12 enhets > omvandlare/12.py", line 78, in __init__ > Tkinter.Tk.__init__(self,parent) > File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1646, in __init__ > self.tk = _tkinter.create(screenName, baseName, className, interactive, > wantobjects, useTk, sync, use) > TypeError: create() argument 1 must be string or None, not classobj > > OR > > when i have the line: > app = Change_units_tk(enhetsomvandlare_tk) > changed to: > app = Change_units_tk(None) > I will get the error message: > > Exception in Tkinter callback > Traceback (most recent call last): > File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__ > return self.func(*args) > File "/home/robert/Desktop/programmering/python/12 enhets > omvandlare/12.py", line 107, in Onkgtolbs > self.LV.set("Kg to lbs") > File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1725, in __getattr__ > return getattr(self.tk, attr) > AttributeError: LV > > Which is the one I really don't get... > > > > Anyways, I've searched the net for some help, but couldn't find anything > really helpful. (I know I probably missed it, but this was easier... :P) > > Help is appreciated, (I'm a first time poster). > > Have a nice day! :) > > /Robert > -- > View this message in context: > http://old.nabble.com/Multiple-windows%2C-accessing-variables-across-them-won%27t-work-for-me-%28Using-Tkinter%29-tp29503063p29503063.html > Sent from the Python - tkinter-discuss mailing list archive at Nabble.com. > > _______________________________________________ > Tkinter-discuss mailing list > Tkinter-discuss@python.org > http://mail.python.org/mailman/listinfo/tkinter-discuss >
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