Как получить значение text input kivy?

Я уже пользовался text input, но на этот раз я вынужден искать решение здесь. Я пытался использовать id: ... но
безрезультатно

:
size_hint_y: 0.2
text: 'get links'
on_press:
self.FROM = 'lon' # так все работает
self.TO = 'par' # так все работает
#self.FROM = from_.text ############ не удается получить это значение
#app.TO = to_.text ####
#self.links_grid.clear_widgets()
#self.clear_widgets()
self.SEARCH()

Вот код:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from kivy.app import App
from kivy.uix.button import Button
from kivy.lang import Builder

class GetLinksButton(Button):

def __init__(self, **kwargs):
super(GetLinksButton, self).__init__(**kwargs)

self.FROM = ''
self.TO = ''

t = '''
'Driver Pego', 'London - Paris'
'Driver Pego', 'London - Sidney'
'Driver Pego', 'London - Rom'
'Driver Pego', 'Vena - Paris'
'Driver Pego', 'Goa - Paris'
'''
self.DRIVES = t.read().split("\n")


link_number = 1

def get_links(self):
self.links_grid.clear_widgets(self.children)
self.link_number = 1


for i in self.DRIVES:
print(i)
try:
i = ','.join(i)
except:
pass

link_button = LinkButton(
text=str(self.link_number) + ' / ' +
" / ".join(i.split(","))
)
self.link_number += 1
self.links_grid.add_widget(link_button)

def SEARCH(self):
D = self.DRIVES
d = []

print('==============\n',self.FROM.lower())
if self.FROM != '' and self.FROM != 'From':
for i in list(set(D)):
if i!='':
place = list(eval(i))[1].split('-')[0].lower().strip()
if place.startswith(self.FROM.lower().strip()):

d.append(list(eval(i)))
D = d

d = []

if self.TO != '' and self.TO != 'To':
for i in D:
if i!='':

place2 = i[1].split('-')[1].lower()
if self.TO.lower() in place2:
d.append(i)
D = d
d = []


self.DRIVES = D
self.get_links()


class LinkButton(Button):
pass

class Test(App):

def build(self):
return root

root = Builder.load_string('''
#:kivy 1.9.0

#:set color_button (227/255., 62/255., 26/255.,.8)
#:set Font2 35
#:set Font 40

GridLayout:
#rows: 1
cols: 1
padding: 5
spacing: 10

from_: from_
to_: to_

TI:
text: "From"
id: from_

TI:
text: "To"
id: to_



RightArea:

:

background_color: color_button
background_normal: ''
pos_hint: {'center_x': .5, 'center_y':.5}
size_hint: .3, .2
never_selected: False
text:' Input amount '
#input_filter: 'int'
padding_y: [self.height / 2.0 - (self.line_height / 2.0) * len(self._lines), 0]
padding_x: [self.width / 2.0 - self._get_text_width(max(self._lines, key=len), self.tab_width, self._label_cached) / 2.0, 0] if self.text else [self.center[0], 0]
on_focus: if self.never_selected == False: self.text = ''; self.never_selected = True
font_size: 30
multiline:False
halign: 'right'
valign: 'middle'
font_size: Font
font_color: 1,1,1,1
foreground_color: color_font
foreground_color: 1,1,1,1
#on_release: app.SUMM = self.text


:
cols: 1
size_hint_x: 0.3
spacing: '10dp'

ScrollView:
LinksGrid:
id: links_grid
background_color: color_button
background_normal: ''
font_size: Font

GetLinksButton:
links_grid: links_grid
background_color: color_button
text: "SEARCH"
background_normal: ''
font_size: Font

:
cols: 1
spacing: '5dp'
size_hint_y: None
height: self.minimum_height

:
size_hint_y: 0.2
text: 'get links'
on_press:
self.FROM = 'lon'
self.TO = 'par'
#from_.text
#app.TO = to_.text
#self.links_grid.clear_widgets()
#self.clear_widgets()
self.SEARCH()

:
size_hint_y: None
height: '80dp'
font_size: 30
background_color: color_button
background_normal: ''
''')

Test().run()