Tkinter having problems with packing labels?

[wallgraffiti]

Code:

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import tkinter as tk from urllib.request import urlopen   root=tk.Tk()   pagestuff=[]   pagestuff.append(tk.Label(root, text="This is a test."))   for i in pagestuff:     i.pack(anchor=tk.NW)   def goto():     global pagestuff     for i in pagestuff:         i.pack_forget()         i.destroy()         del i     for i in str(urlopen(address.get()).read()).split("\n"):         if i.startswith("h1>"):             pagestuff.append(tk.Label(root, text=i[2:], font="Helvetica 15"))         elif i.startswith("p>"):             pagestuff.append(tk.Label(root, text=i[1:]))     for i in pagestuff:         i.pack()   address=tk.Entry(root) goto=tk.Button(root, text="Go To", command=goto)   address.pack() goto.pack()   tk.mainloop()

Shell Error(once address is inputed):

Error:
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\mjmin\AppData\Local\Programs\Python\Python38-32\lib\tkinter\__init__.py", line 1883, in __call__
    return self.func(*args)
  File "D:\browse\actualthing.py", line 25, in goto
    i.pack()
  File "C:\Users\mjmin\AppData\Local\Programs\Python\Python38-32\lib\tkinter\__init__.py", line 2387, in pack_configure
    self.tk.call(
_tkinter.TclError: bad window path name ".!label"

For context, I'm making my own little website format and browser/engine for said format.