Cómo eliminar una fila de un cuadro de lista en TKinter y SQLite3

Estoy tratando de averiguar cómo eliminar una fila tanto del cuadro de lista como de sqlite3. Tengo una función 'delButton' en la parte inferior, ¿necesito eliminar la línea del cuadro de lista y sql? No estoy seguro de lo que estoy haciendo aquí, en lo que respecta a la parte de eliminación, he juntado esa función copiando y pegando de varios ejemplos

from Tkinter import *
import sqlite3

class Hello():
    def __init__(self, master):

        frame=Frame(master, width=80, height=50)
        frame.pack()

        self.text = Label(frame, text="         ")
        self.text.pack()
        self.text.grid(row=0, sticky=W)
        self.text["text"] = "                  Address Book"

        self.lab = Label(frame, text="name")
        self.lab.pack(side=LEFT)
        self.lab.grid(row=1)

        self.nameField = Entry(frame, text = "name", width=30)
        self.nameField.insert(0, "Enter Name")
        self.nameField.pack()
        self.nameField.grid(row=1)
        self.nameField.bind("<FocusIn>", self.clearNameField)

        self.ageField = Entry(frame, text = "age", width=30)
        self.ageField.insert(0, "Enter Age")
        self.ageField.pack()
        self.ageField.grid(row=2)
        self.ageField.bind("<FocusIn>", self.clearAgeField)

        self.phoneField = Entry(frame, text = "phone", width=30)
        self.phoneField.insert(0, "Enter Phone #")
        self.phoneField.pack()
        self.phoneField.grid(row=3)
        self.phoneField.bind("<FocusIn>", self.clearPhoneField)

        self.fbField = Entry(frame, text = "fblink", width=30)
        self.fbField.insert(0, "Enter Facebook Link")
        self.fbField.pack()
        self.fbField.grid(row=4)
        self.fbField.bind("<FocusIn>", self.clearFbField)

        self.btn=Button(frame, text='Add', command=self.add_note)
        self.btn.pack()
        self.btn.grid(row=5, rowspan=1, sticky="w")

        self.showbtn = Button(frame, text='Update', command=self.show_notes)
        self.showbtn.pack()
        self.showbtn.grid(row=5, rowspan=1, sticky="")

        self.delbtn = Button(frame, text='Delete', command=self.del_notes)
        self.delbtn.pack()
        self.delbtn.grid(row=5, rowspan=1, sticky="e")


        self.content=Listbox(master, width=50)
        self.content.pack()

    def clearNameField(self, event):
        self.nameField.delete(0,END)

    def clearAgeField(self, event):
        self.ageField.delete(0,END)

    def clearPhoneField(self, event):
        self.phoneField.delete(0,END)

    def clearFbField(self, event):
        self.fbField.delete(0,END)


    def add_note(self):
        if self.nameField.get() == "":
            self.text["text"] = "Please type sumting"
        else:
            item = self.nameField.get()
            item2 = self.ageField.get()
            item3 = self.phoneField.get()
            item4 = self.fbField.get()
            self.nameField.delete(0, END)
            self.ageField.delete(0, END)
            self.phoneField.delete(0, END)
            self.fbField.delete(0, END)

            conn = sqlite3.connect('phonebook1.db')
            c = conn.cursor()
            conn.execute('''
        CREATE TABLE IF NOT EXISTS people(name TEXT primary key,
                       age TEXT, phone TEXT, fblink TEXT)''')
            c.execute("insert into people values (?, ?, ?, ?)", (item, item2, item3, item4))
            conn.commit()
            list=c.execute("SELECT * FROM people")
            conn.commit()

            for row in list:
                self.content.insert(END, row)
            c.close()


    def del_notes(self):
        conn = sqlite3.connect('phonebook1.db')
        c =conn.cursor()
        list=c.execute("SELECT * FROM people")
        conn.commit()
        for row in list:
            self.content.delete(END, row)
        c.close()

Aquí está el error.

File "phonebookapp.py", line 106, in del_notes
    self.content.delete(END, row)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py", line 2565, in delete
    self.tk.call(self._w, 'delete', first, last)
TclError: bad listbox index "ben ben ben benn": must be active, anchor, end, @x,y, or a number