from Tkinter import *
root = Tk()
labelfont = ('times', 20, 'bold')                  # family, size, style
widget = Label(root, text='Hello config world')
widget.config(bg='black', fg='yellow')             # yellow text on black lable
widget.config(font=labelfont)                      # use a larger font
widget.config(height=3, width=20)                  # initial size: lines,chars
widget.pack(expand=YES, fill=BOTH)
root.mainloop()