Tkinter focus

[catlessness]

the solution i have now is very limited to my program, I simply bind every widgets with '<Return>' as:

def refresh(event):
    '''
    function here
    '''

widget1.bind('<Return>',refresh)
widget2.bind('<Return>',refresh)
#......
window.mainloop()

so that after i input the value i need to press entre to run the function i need.