Python formular nevracia kod

import sqlite3
import tkinter
# premenne#





# praca s DB  Pripoj sa atd ....#
db = sqlite3.connect("mydbx")
db.commit()
#ak nie je DB tak vytvor
def CreateDB():
 db.execute("create table user(name, login)")
 db.execute("create table recept(name, ID, struct)")
 db.commit()

# Zapis do DB #
# Zapis Name and Login#
def ZapisDB(name,login):
 db.execute("insert into user(name, login) values('%s', '%s')" % (name, login))
 db.commit()

# Show user #
def Showuser():
 vystup = db.execute("select * from user")
 for zaznam in vystup:
     print (zaznam)
 vystup = db.execute("select * from user")
 print
 for jmeno, prijmeni in vystup:
     print (name, login)
 db.commit()

# WINDOW HLAVEN OKNA

#hlavne okno
from tkinter import *
hlavne=Tk()

name=Entry(hlavne)
name.pack()
name.focus_set()

login=Entry(hlavne)
login.pack()
login.focus_set()



OK=Button(hlavne, text='Zapis', command=ZapisDB(name,login))
OK.pack()

hlavne.mainloop()


#hlavna cast#


Showuser()

name=Entry(hlavne)...
OK=Button(hlavne, text='Zapis', command=ZapisDB(name,login))...
db.execute("insert into user(name, login) values('%s', '%s')" % (name, login))...

nam=Entry(hlavne)
nam.pack()
nam.focus_set()......

name = nam.get()

Taceback (most recent call last):
  File "C:\Documents and Settings\PLC\Desktop\DBConnector\Main.py", line 57, in <module>
    name = nam.get()
  File "C:\Python32\lib\tkinter\__init__.py", line 2375, in get
    return self.tk.call(self._w, 'get')
_tkinter.TclError: invalid command name ".17014224"

v = StringVar()
nam=Entry(hlavne, textvariable=v)
nam.pack()
nam.focus_set()......

name = v.get()

from tkinter import *

def volanafunkcia():
    print (add.get())


def hello():
    print ("hello")

#grafika
root = Tk()

#velkost okna
velkost = Canvas(root, width=500, height=500)
velkost.pack()

def vloz():
 add = StringVar()
 vstup = Entry(root, textvariable=add)
 vstup.pack()
 vstup.focus_set()
 tlacitko = Button(root, text="Nacitaj", width=10, command=volanafunkcia, font="ArialNarrow 10")
 tlacitko.pack()

menuLista = Menu(root)
menuLista.add_command(label="Add!", command=vloz)
menuLista.add_command(label="Exit!", command=root.destroy)


#zobrazenie menu
root.config(menu=menuLista)
mainloop()

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python32\lib\tkinter\__init__.py", line 1399, in __call__
    return self.func(*args)
  File "C:\Documents and Settings\PLC\Desktop\DBConnector\mydbx.py", line 3, in volanafunkcia
    print (add.get())
NameError: global name 'add' is not defined

NameError: global name 'add' is not defined

from tkinter import *

 add = StringVar()

 def volanafunkcia():
     global add
     print (add.get())


 def hello():
     print ("hello")

 #grafika
 root = Tk()

 #velkost okna
 velkost = Canvas(root, width=500, height=500)
 velkost.pack()

 def vloz():
  global add
  vstup = Entry(root, textvariable=add)
  vstup.pack()
  vstup.focus_set()
  tlacitko = Button(root, text="Nacitaj", width=10, command=volanafunkcia, font="ArialNarrow 10")
  tlacitko.pack()

 menuLista = Menu(root)
 menuLista.add_command(label="Add!", command=vloz)
 menuLista.add_command(label="Exit!", command=root.destroy)


 #zobrazenie menu
 root.config(menu=menuLista)
 mainloop()