'_tkinter.tkapp' object has no attribute 'delete'

def show(root):

root.tk = ScrolledText(root)
root.tk.pack(fill=X, padx=(200, 30), expand=True)
root.tk.place(width=400,height=250,x=70, y=70)

kg = root.tk
kg.delete('1.0', END)

for line in lines:
kg.insert(INSERT,line)
print(line)