python - Not displaying Time in label in kivy -

i kind of new kivy , trying display time in it

here python code snippet(removed unnecessary screens/parts arbitrary reasons):

from kivy.app import app kivy.uix.screenmanager import screenmanager, screen import time kivy.uix.label import label class myscreen(screen):    def update(self, *args):         self.timeb.text = time.asctime()         return time.asctime() class myapp(app):    def build(self):         x=myscreen()         root = screenmanager()         clock.schedule_interval(x.update, 1)         root.add_widget(password(name='screen0'))         root.add_widget(correct(name='screena'))         root.add_widget(myscreen(name='screen1'))         s=[x,root]         in s:             return if __name__ == '__main__':     myapp().run() 

.kv file(removed unnecessary screens/parts arbitrary reasons):

myscreen: <myscreen>: #         timeb:time_box     boxlayout:         orientation: "horizontal"         pos_hint: {'top':1}         height: "40dp"         size_hint_y: none         label:               id:time_box                text:root.update()               size_hint_x: 6               font_size:30               font_name:"roboto-light.ttf" 

as can see in code have added few screens screen first come if change the

s=[x,root] in s:       return 

to just

return root 

then time doesn't update itself.

could help?

thanks!

maybe forgot type something, kv coded wrong. why there hanging myscreen: , assigned to? need main rule somewhere, see none. assigned myscreen: <myapp>: normal return myscreen() or return some_scrmanager , works.

from kivy.app import app kivy.uix.screenmanager import screenmanager, screen kivy.clock import clock import time kivy.uix.label import label kivy.lang import builder  builder.load_string(''' <myapp>:     myscreen: <myscreen>: #     timeb:time_box     boxlayout:         orientation: "horizontal"         pos_hint: {'top':1}         height: "40dp"         size_hint_y: none         label:             id:time_box              text:root.update()             size_hint_x: 6             font_size:30 ''') class myscreen(screen):    def update(self, *args):         self.timeb.text = time.asctime()         return time.asctime() class myapp(app):    def build(self):         x=myscreen()         root = screenmanager()         clock.schedule_interval(x.update, 1)         root.add_widget(myscreen(name='screen1'))         s=[x,root]         in s:             return if __name__ == '__main__':     myapp().run() 

and same kv, more reasonable python code looke this:

<screenmgr>:     myscreen: <myscreen>:     ...  class myscreen(screen):     def __init__(self, **kw):         super(myscreen, self).__init__(**kw)         clock.schedule_interval(self.update, 1)      def update(self, *args):         self.timeb.text = time.asctime()         return time.asctime()  class screenmgr(screenmanager):     pass  class myapp(app):    def build(self):         x=myscreen()         root = screenmgr()         root.add_widget(myscreen(name='screen1'))         return root if __name__ == '__main__':     myapp().run() 

because there's no need call update() screen class in building function , outside class want use presuming it'll run forever(do plan stop time?).