python - Validate tkinter user input, presence check -


i need validate user inputs on tkinter gui. need have presence check, format check(a date) , 1 of inputs can 1 of 3 options , not sure how these. have looked @ other examples hard understand because have not been using classes. know how this?

here example code

entry1= entry(window, bg="blue", fg="white",font="40") entry2= entry(window, bg="blue", fg="white",font="40") entry3= entry(winodw, bg="blue", fg="white",font="40")   #assigning input boxes area on screen entry1.grid(row=1, column=1) entry2.grid(row=2, column=1) entry3.grid(row=3, column=1)  forename=entry1.get() surname=entry2.get() dateofbirth=entry3.get()

you need validate function checks string variable of 3 entry fields, ie:

def validate():     if forename == valid_forename:         print 'valid forename'     else:         print '%s not valid forename' % forename

and can call button:

vbutton = button(window, text='validate', command=validate) vbutton.grid()

your 3 types of 'checks' go validate() function. should able accomplish these simple value checking, if can't, should post specific question type of value checking can't work , tried make work.


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