[Tkinter] How Does Entry Verification Work?

[gw1500se]

Thanks but I stumbled on a solution that works. Rather than register the validation routine I simply use the validation as a command on the button:

submitButton=tk.Button(top,text='Submit',command=validatePhone)

Thus the only time I try to validate is when the submit button is clicked. My validate probably does not need everything I am doing in it but it helps for debugging.

def validatePhone():
    num=phone.get()
    print(num)
    pattern=re.compile('\d{3}-\d{3}-\d{4}')
    if (pattern.search(num)):
        print('true')
        top.quit()
    else:
        phone.configure(background='Red')
        print('false')
    return(pattern.search(num))

When 'top.quit' is called it lets the script proceed with processing the tkinter data.