Buttons on User Interface Hangs

I believe you are after somthing like this:

import Tkinter import timeclass simpleapp_tk(Tkinter.Tk):    def __init__(self,parent):        Tkinter.Tk.__init__(self,parent)        self.parent = parent        self.initialize()    def initialize(self):        self.grid()        button = Tkinter.Button(self,text=u"Click me !",                                command=self.OnButtonClick)        button.grid(column=1,row=0)        self.grid_columnconfigure(0,weight=1)        self.resizable(True,False)        self.i = 0; #<- make counter     def OnButtonClick(self):                    print 'deep'        self.i += 1;        if self.i==10: return #<1-- stop if we hit 10 iterations        self.after(1000, self.OnButtonClick) #<- use this    def OnPressEnter(self,event):        self.labelVariable.set("You pressed enter !")if __name__ == "__main__":    app = simpleapp_tk(None)    app.title('my application')    app.mainloop()

Please have a look at marked changes. Basically, its better to use after method do do something at given time and not to block whole tk window. Thus if you want something to be executed 10 times, just make some veriable to hold the counter self.i and call OnButtonClick using self.after method.

As an alternative, you can put the loop into a separate thread. For example:

import Tkinter import timeimport threadingclass simpleapp_tk(Tkinter.Tk):    def __init__(self,parent):        Tkinter.Tk.__init__(self,parent)        self.parent = parent        self.initialize()    def initialize(self):        self.grid()        button = Tkinter.Button(self,text=u"Click me !",                                command=self.OnButtonClick)        button.grid(column=1,row=0)        self.grid_columnconfigure(0,weight=1)        self.resizable(True,False)        # define a thread, but dont start it yet.        # start it when button is pressed.        self.t = threading.Thread(target=self.do_in_loop)    def do_in_loop(self):        # this will be executed in a separate thread.        for i in range(10):            print i, 'deep'            time.sleep(1)    def OnButtonClick(self):        # start the thread with the loop         # so that it does not block the tk.        if not self.t.isAlive():            self.t.start()    def OnPressEnter(self,event):        self.labelVariable.set("You pressed enter !")if __name__ == "__main__":    app = simpleapp_tk(None)    app.title('my application')    app.mainloop()