not recieving the textbox value in the function - python-3.x

Question

'''
basically i am trying to make a textbox to take input from the user and opening with some default name and changing it to user given name in another textbox but the value of the textbox always is eter a none or empty string which raises an error
'''
`nweb=Toplevel()
nweb.configure(background='blue')
nweb.geometry('1366x768')
fram.destroy()
n1=Label(nweb,text='enter the following details:',font='Aerial 16',fg='yellow',bg='blue').grid(column=0,row=1)
n2=Label(nweb,text='DONGLE',font='Aerial 100',fg='yellow',bg='blue').grid(column=0,row=0)
n3=Label(nweb,text='website name:',font='Aerial 10',fg='yellow',bg='blue').grid(column=0,row=2)
edit = Text(nweb, width=50, height=1)
edit.grid(column=1,row=2)
n5=Label(nweb,text='keywords (write it in words as sentence):',font='Aerial 10',fg='yellow',bg='blue').grid(column=0,row=4)
edit2 = Text(nweb, width=50, height=1)
edit2.grid(column=1,row=4)
st=edit2
def getdetail():
def webcontent():
webcon=Toplevel()
webcon.geometry('1366x768')
webcon.configure(background='blue')
text = Text(webcon)
text.insert('1.0','ENTER YOUR WEBSITE CONTENT:')
text.pack(side=TOP,fill=BOTH,expand=1)
if text.get(1.0,END)!='':
with open('C:\\Users\\User\\OneDrive\\Desktop\\MUSTAFA\'S PROJECT FILES\\websites\\1234.dat','ab') as f1:
pickle.dump(text.get(1.0,END),f1)
os.rename('1234.dat',str(st))
err=False
try:
with open('search.dat','rb') as f1:
while True:
l=pickle.load(f1)
if l[0]==edit.get(1.0,END):
g=Label(nweb,text='webite already taken',fg='red',bg='blue').grid(column=0,row=6)
err=True
elif 'www.' not in edit.get(1.0,END) and '.com' not in edit.get(1.0,END) :
g=Label(nweb,text='inappropriate webite name',fg='red',bg='blue').grid(column=0,row=6)
err=True
except EOFError:
if not(err):
with open('search.dat','ab') as f1:
l=[edit.get(1.0,END),edit2.get(1.0,END)]
pickle.dump(l,f1)
edit.delete(1.0,END)
edit2.delete(1.0,END)
webcontent()
create=Button(nweb, text='enter' , command=getdetail, bg='yellow').grid(column=0,row=5)`
'''and i have tried everything from tkinter variables to python variables if u help me out it will be very kind of u'''