My application is crashing randomly, and I thought it might have to do with it manipulating widgets that are not yet mapped, despite them being already gridded. Have you experienced this problem?
I supply some code that shows that the print function happens before tkinter recognizes the button being mapped, even though it is already gridded. I couldn't find a way to wait for the button being properly mapped before the print function is executed.
from tkinter import * class fb( Frame ): def fastbuttons( self ): b = Button(self) b.grid() print( b.winfo_ismapped() ) def __init__( self, master=None ): Frame.__init__( self, master ) self.grid( sticky='nsew' ) self.button = Button( self, text='Start', command=self.fastbuttons ) self.button.grid() if __name__ == '__main__': root = Tk() app = fb( master=root ) app.mainloop()