kivy binding issue

[hammer]

After attempting to model after above suggestions , the MyDataBase class seems to work well, however; the error below of not recognizing myTPHM has me stumped as the deBug console agrees it is a TabbedPanelHeader widget.

Also can you clarify the need for the __init__ in the MyApp class?
I understand I have to Run the sub-classed App of Kivy and is it OK to add the the data_base and TabbedPannel as arguments in the __init__ method?

Error:
Exception has occurred: TypeError
add_widget() missing 1 required positional argument: 'widget'
  File "/home/mark/Python Environments/FirstEnvProject/ClassTest6.py", line 52, in __init__
    self.root_widget.add_widget(self.myTPHM)
  File "/home/mark/Python Environments/FirstEnvProject/ClassTest6.py", line 103, in main
    MyApp(my_db,TabbedPanel).run()
  File "/home/mark/Python Environments/FirstEnvProject/ClassTest6.py", line 107, in <module>
    main()

from sqlite3 import dbapi2
import kivy
from kivy.uix.tabbedpanel import TabbedPanel
from kivy.app import App
from kivy.uix.tabbedpanel import TabbedPanelHeader
from kivy.uix.button import Button
from kivy.uix.stacklayout import StackLayout
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
import sqlite3

#con=sqlite3.connect('bovine.db');
#c=con.cursor();
#c.execute(""" CREATE TABLE cattleData
#           (tagNo integer,
#            Loc text,
#            sex text,
#            type text)
#           """)
#c.execute(""" CREATE TABLE locations
#           (Hermas text,
#            Tobaco Barn text,
#            Chambers text,
#            New Barn)
#           """)

locList=["Hermas","Tobbaco Barn","New Barn","Chambers"]
opList=["Location","Add","Edit"]
class MyDataBase:
    def __init__(self,db_path):
        self.db_path=db_path

    def connect(self):
        self.con=sqlite3.connect(self.db_path)
        self.c=self.con.cursor()

    def insert_cattledata(self,tag,loc,sex,type_):
        self.cur.execute("INSERT INTO cattleData VALUES(?,?,?,?)",(tag,loc,sex,type_))
        self.con.commit()


class MyApp(App):
    def __init__(self,data_base,TabbedPanel):
        self.db=data_base
        self.root_widget=TabbedPanel
        self.root_widget.do_default_tab=False
    

        for i in opList:
            myTPHM=TabbedPanelHeader()
            myTPHM.text=str(i)
            self.root_widget.add_widget(myTPHM)
            if str(i)=='Location':
                myTPLoc=TabbedPanel()
                myTPLoc.do_default_tab=False
                self.myTPHM.content=myTPLoc
                for j in locList:
                     myTPHL=TabbedPanelHeader()
                     myTPHL.text=str(j)
                     myTPLoc.add_widget(myTPHL)
                     
            if str(i)=='Add':
                myTPHM.content=self.enterScreen()
        
        return self.root_widget

    def enterScreen(self):    
        stkEnter=StackLayout(orientation='lr-tb',spacing=4)
        lbl1=Label(text='Tag No',size_hint=(.1,.04))
        lbl2=Label(text='Location',size_hint=(.1,.04))
        lbl3=Label(text='Sex',size_hint=(.1,.04))
        lbl4=Label(text='type',size_hint=(.1,.04))
        self.txtTag=TextInput(text='',size_hint=(.1,.06))
        self.txtLoc=TextInput(text='',size_hint=(.1,.06))
        self.txtSex=TextInput(text='',size_hint=(.1,.06))
        self.txtType=TextInput(text='',size_hint=(.1,.06))
        btnAccept=Button(text='add',size_hint=(.1,.04))
        stkEnter.add_widget(lbl1)
        stkEnter.add_widget(self.txtTag)
        stkEnter.add_widget(lbl2)
        stkEnter.add_widget(self.txtLoc)
        stkEnter.add_widget(lbl3)
        stkEnter.add_widget(self.txtSex)
        stkEnter.add_widget(lbl4)
        stkEnter.add_widget(self.txtType)
        stkEnter.add_widget(btnAccept)

        btnAccept.bind(on_press=self.on_button)
        return stkEnter

    def on_button(self):
        self.db.insert_cattledata(self.txtTag.text,self.txtLoc.text,self.txtSex.text,self.txtType.text)
        self.txtTag.text=''
        self.txtLoc.text=''
        self.txtSex.text=''
        self.txtType.text=''


def main():
    my_db=MyDataBase('bovine.db')
    my_db.connect()
    MyApp(my_db,TabbedPanel).run()
    

if __name__ == '__main__':
    main()