Updating a label from an entry field on button push with tkinter in Python 3.5.2 -

i trying create window line label, entry field, current value label, , "update value" button.

here example:

this have far. can entered value print console, can't seem work out how entered value , change currentvalue label reflect value pressing button:

from tkinter import* main=tk()  #stringvar currentvalue in r0c2 currentvalue = stringvar(main, "0")  #called setvalues button, looks content in entry box , updates "current" label def setvalues():         content = entry.get()         print(content)   #this kills program def exitprogram():         exit()  #title , window size main.title("title") main.geometry("350x200")  #descriptions on far left label(main, text="duration (min): ").grid(row=0, column=0)  #entry boxes values amidship entry=entry(main, width=10) entry.grid(row=0, column=1)  #displays value set to. currentvalue = label(textvariable=currentvalue) currentvalue.grid(row=0,column=2)  #takes inputted values , sets them in "current" column using def setvalues setvalues=button(text='set values',width=30,command=setvalues) setvalues.grid(row=9, column=0, columnspan=2)  #red button end program exitbutton=button(main, text='exit program',fg='white',bg='red',width=30, height=1,command=exitprogram) exitbutton.grid(row=20, column = 0, columnspan=2) main.mainloop() 

there couple of problems code.

firstly, overwriting setvalues function setvalues button widget, , similarly, overwriting currentvalue stringvar currentvalue label.

to set stringvar, use .set method.

don't use plain exit in script, that's meant used in interactive interpreter session, proper exit function sys.exit. however, in tkinter program can call .destroy method of root window.

here's repaired version of code.

import tkinter tk main = tk.tk()  #stringvar currentvalue in r0c2 currentvalue = tk.stringvar(main, "0")  #called setvalues button, looks content in entry box , updates "current" label def setvalues():     content = entry.get()     print(content)     currentvalue.set(content)  #this kills program def exitprogram():     main.destroy()  #title , window size main.title("title") main.geometry("350x200")  #descriptions on far left tk.label(main, text="duration (min): ").grid(row=0, column=0)  #entry boxes values amidship entry = tk.entry(main, width=10) entry.grid(row=0, column=1)  #displays value set to. currentvaluelabel = tk.label(textvariable=currentvalue) currentvaluelabel.grid(row=0,column=2)  #takes inputted values , sets them in "current" column using def setvalues setvaluesbutton = tk.button(text='set values',width=30,command=setvalues) setvaluesbutton.grid(row=9, column=0, columnspan=2)  #red button end program exitbutton = tk.button(main, text='exit program',fg='white',bg='red',width=30, height=1,command=exitprogram) exitbutton.grid(row=20, column = 0, columnspan=2) main.mainloop() 

btw, it's idea avoid "star" imports. doing from tkinter import * dumps 130 names namespace, unnecessary , creates possibility of name collisions, if star imports several modules. makes code less readable, since reader has remember names defined , ones came imported module(s).