complete form GUI

tk.Checkbutton(root,text="physics",variable=accept2).pack()
accept3=tk.IntVar()
tk.Checkbutton(root,text="chemistry",variable=accept3).pack()
#radiobuttton
tk.Label(root,text="Select Gender:").pack()

gender=tk.StringVar()
tk.Radiobutton(root,text="Male",variable= gender,value="male").pack()
tk.Radiobutton(root,text="female",variable= gender,value="female").pack()
#dropdownlist
tk.Label(root,text="Select year studying:").pack()
combo=ttk.Combobox(root,values=["fy","SY","TY"])
combo.current(0)
combo.pack()
#checkbox
agree=tk.IntVar()
tk.Checkbutton(root,text="I accept terms and Condition",variable=agree).pack()
#printing button
def show():
    print("Name:",r1.get())
    print("Password",r2.get())
    print("selected Subject:",accept.get())
    print(accept2.get())
    print(accept3.get())
    print("gender :",gender.get())
    print("selected from list:",combo.get())
    print("agree or not:", agree.get())


tk.Button(root,text="submit",command=show).pack()

root.mainloop()