I want to print a list in a kivy Label but when I run the code it only shows me the first line of the list. How can I get kivy to print the entire list?

```
from kivy.uix.label import Label
from kivy.uix.screenmanager import ScreenManager,Screen
Import requests
from kivy.lang import Builder
from kivy.uix.scrollview import ScreollView
from kivymd.uix.button import RoundFlatButton 
from kivymd.uix.snackbar import Snackbar
from kivy.app import App

Build.load_string('''
<Page>:
    ScrollView:
        Label:
            id: label
            text: ''
            height: self.texture_size[1]
            text_size: self.width, None
            theme_text_color: "Custom"
            text_color: 1, 1, 1, 1
            font_size: 20
            size_hint: 1, 4
         MDRoundFlatButton:
                text: 'push'
                pos_hint: {'center_x':  .5, 'center_y':  .5}
                on_press: robot.problem()
'''

Class Page(Screen):
    def __init__(self, **kwargs):
         súper(Page, self).__init__(**kwargs)
    def problem(self):
        try:
            objetivo = requests.get(url=self.ids.t1.text)#textinput       
            header = dict(objetivo.headers)
            for x in header:
                self.ids.label.text = x + ' : ' + header[x]
                return self.ids.label.text
        except: 
            self.ids.label.text = '''  ERROR
            (https://www.example.com)'''
            self.ids.labe.text = 'swipe'
            Snackbar(text='         URL ERROR!').show()
            return self.ids.label.text

Class App(App):
    def build(self, **kwargs):
     self.theme_cls.theme_style = 'Dark'
      H = ScreenManager()
      G = Page(mame='hello')
      H.add_widget(G)
      return H

App().run()

```

It only shows me one line of code and it should show me the full list, please help!