l0 = tk.Label(my_w, text='Add Student',
font=('Helvetica', 16), width=30,anchor="c" )
l0.grid(row=1,column=1,columnspan=4)
l1 = tk.Label(my_w, text='Name: ', width=10,anchor="c" )
l1.grid(row=3,column=1)
# add one text box
t1 = tk.Text(my_w, height=1, width=10,bg='white')
t1.grid(row=3,column=2)
l2 = tk.Label(my_w, text='Class: ', width=10 )
l2.grid(row=4,column=1)
# add list box for selection of class
options = StringVar(my_w)
options.set("") # default value
opt1 = OptionMenu(my_w, options, "Three", "Four", "Five")
opt1.grid(row=4,column=2)
l3 = tk.Label(my_w, text='Mark: ', width=10 )
l3.grid(row=5,column=1)
# add one text box
t3 = tk.Text(my_w, height=1, width=4,bg='white')
t3.grid(row=5,column=2)
radio_v = tk.StringVar()
radio_v.set('Female')
r1 = tk.Radiobutton(my_w, text='Male', variable=radio_v, value='Male')
r1.grid(row=6,column=2)
r2 = tk.Radiobutton(my_w, text='Female', variable=radio_v, value='Female')
r2.grid(row=6,column=3)
b1 = tk.Button(my_w, text='Add Record', width=10,
command=lambda: add_data())
b1.grid(row=7,column=2)
my_str = tk.StringVar()
l5 = tk.Label(my_w, textvariable=my_str, width=10 )
l5.grid(row=3,column=3)
my_str.set("Output")