error

[purushottam yadav]

Help me  with  this error .

[INFO   ] [Base        ] Leaving application in progress...
 Traceback (most recent call last):
   File "kivy/properties.pyx", line 861, in kivy.properties.ObservableDict.__getattr__
 KeyError: 'scroll_parent'
 
 During handling of the above exception, another exception occurred:
 
 Traceback (most recent call last):
   File "main.py", line 1938, in <module>
     k.run()
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/app.py", line 950, in run
     runTouchApp()
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/base.py", line 582, in runTouchApp
     EventLoop.mainloop()
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/base.py", line 347, in mainloop
     self.idle()
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/base.py", line 391, in idle
     self.dispatch_input()
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/base.py", line 342, in dispatch_input
     post_dispatch_input(*pop(0))
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/base.py", line 308, in post_dispatch_input
     wid.dispatch('on_touch_up', me)
   File "kivy/_event.pyx", line 709, in kivy._event.EventDispatcher.dispatch
   File "/home/purushottamdev/directory_env/f/ff/kivymd/uix/behaviors/ripplebehavior.py", line 294, in on_touch_up
     return super().on_touch_up(touch)
   File "/home/purushottamdev/directory_env/f/ff/kivymd/uix/button.py", line 947, in on_touch_up
     return super().on_touch_up(touch)
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/uix/behaviors/button.py", line 179, in on_touch_up
     self.dispatch('on_release')
   File "kivy/_event.pyx", line 705, in kivy._event.EventDispatcher.dispatch
   File "kivy/_event.pyx", line 1248, in kivy._event.EventObservers.dispatch
   File "kivy/_event.pyx", line 1132, in kivy._event.EventObservers._dispatch
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/lang/builder.py", line 57, in custom_callback
     exec(__kvlang__.co_value, idmap)
   File "<string>", line 328, in <module>
   File "main.py", line 1872, in ca
     self.help_str.get_screen('searchscreen').ids.displaying.add_widget(Post_12(name = 'purushottam' ,
   File "main.py", line 1131, in __init__
     super().__init__(**kw)
   File "main.py", line 1064, in __init__
     super().__init__(**kw)
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/uix/behaviors/button.py", line 121, in __init__
     super(ButtonBehavior, self).__init__(**kwargs)
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/uix/boxlayout.py", line 145, in __init__
     super(BoxLayout, self).__init__(**kwargs)
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/uix/layout.py", line 76, in __init__
     super(Layout, self).__init__(**kwargs)
   File "/home/purushottamdev/directory_env/f/ff/kivymd/uix/behaviors/backgroundcolorbehavior.py", line 138, in __init__
     super().__init__(**kwargs)
   File "/home/purushottamdev/directory_env/f/lib/python3.8/site-packages/kivy/uix/widget.py", line 350, in __init__
     super(Widget, self).__init__(**kwargs)
   File "kivy/_event.pyx", line 264, in kivy._event.EventDispatcher.__init__
   File "kivy/properties.pyx", line 498, in kivy.properties.Property.__set__
   File "kivy/properties.pyx", line 545, in kivy.properties.Property.set
   File "kivy/properties.pyx", line 600, in kivy.properties.Property.dispatch
   File "kivy/_event.pyx", line 1248, in kivy._event.EventObservers.dispatch
   File "kivy/_event.pyx", line 1154, in kivy._event.EventObservers._dispatch
   File "main.py", line 1152, in on_description
     self.ids.scroll_parent.ids.stacks_layouts_.add_widget(Bu(text = t )  )
   File "kivy/properties.pyx", line 864, in kivy.properties.ObservableDict.__getattr__
 AttributeError: 'super' object has no attribute '__getattr__'

class post_1(ButtonBehavior, MDBoxLayout):


    name = StringProperty('')
    post_source = StringProperty('')
    profile_source = StringProperty('')
    description  = StringProperty('')
    distance = StringProperty('')
    details = StringProperty('')

    lat = StringProperty('none')
    lon = StringProperty('none')
    media  = ListProperty([])


    def __init__(self, **kw):
        super().__init__(**kw)

class Post_12(post_1):
    s_up = "no"


    def __init__(self, **kw):
        super().__init__(**kw)
        #self.setup()
        #self.s_up = "no"


    def on_description(self , v , b ):
        if self.s_up == "no" :
            self.s_up = "yes"


            print( v,  b )

            time.sleep(.5)
            #posts__.ids.stacks_layouts_.clear_widgets()
            l=  3 * (Window.size[0])
            h=0
            #print(self.description , "initddd<<<<<" , self.description.split(" ") )

            for t in self.description.split(" ") :
                #print(t , "tttttt<<<<<<<<<<<<<<<<<<<<<<<<" , self.description , "dddd<<<<")

                self.ids.scroll_parent.ids.stacks_layouts_.add_widget(Bu(text = t )  )
                h += (40) * len(t) * (25)
                l += len(t)*25 + dp(5)

            s = l * dp(10)
            px = 0+0+2 *(Window.size[0]) * ( dp(10) )
            a = s + h + px
            y = (  (a)/( Window.size[0]  -  dp(20)  )+   dp(20) )

            print("mmmmmmmmmmmmmmmmmm" , self.media )

            if self.media == [] :
                #self.remove_widget(self.ids.car)
                self.post_source = ""

            else :

                while not  self.post_source :


                    for i in self.media :
                        if i['source'].endswith(".jpeg") or  i['source'].endswith(".jpg") or i['source'].endswith(".png") :
                            self.post_source = i['source']
                            break
                        elif i== len(self.media) :
                            break


                print("........not.....................")

            if self.post_source == "" :
                self.remove_widget(self.ids.car)


            self.ids.stack_parent.size_hint = (None, None)
            self.ids.stack_parent.size = [ Window.size[0] , y  ]



            #posts__.ids.stacks_layouts_.minimum_size#[ Window.size[0] ,  Window.size[1] *( len(posts__.description ) ) ]
            #self._size = [ Window.size[0] , y + Window.size[1]  + Window.size[1]      ]
            print("value ", self.post_id  , self.size  , y )
            #k.update_post_size(self.post_id , self.size  , y )

<Post_12>:
    #post_id: -1

    orientation: 'vertical'
    padding: ["0dp", "10dp","0dp", "10dp"]
    spacing: [ mtx.dp(20) ,  mtx.dp(50) ]
    adaptive_height: True



    #MDBoxLayout:
    #    adaptive_height: True
        #size_hint_y: .1
#        ThreeLineAvatarListItem:
#            size_hint_x: .7
#            text: root.name
#            bold: True
#            secondary_text: root.details
#            tertiary_text:  root.distance
#
#            ImageLeftWidget:
#                source: root.profile_source

#        MDIconButton:
#            id: map
#            icon : 'adjust'
            #text: 'follow'
            #size_hint_x: .15
#            on_press:

#                app.callback_1(root)



    MDBoxLayout:
        id: scroll_parent
        md_bg_color:(1,1,1,1)
        adaptive_height: True
        orientation: 'vertical'
        #padding: ["10dp", "10dp","10dp", "10dp"]
        #spacing: [ mtx.dp(10) ,  mtx.dp(10) ]



        MDBoxLayout:
            #size_hint_y: .08
            adaptive_height: True
            id:stack_parent
            #size_hint: (None, None)
            #size:  [ Window.size[0] ,  Window.size[1] * (5/10)  ]


            MyStackLayout:
                id:stacks_layouts_



    MDBoxLayout:
        id : car
        size_hint: (None, None)
        size:  [ Window.size[0] ,  Window.size[1] * (5/10)  ]
        padding: ["30dp", "10dp","30dp", "10dp"]
        spacing: [ mtx.dp(30) ,  mtx.dp(10) ]
        md_bg_color:(1,1,1,1)
        adaptive_height: True
        #orientation: 'vertical'




        FitImage:
            source: root.post_source
            radius: [20,]
            allow_stretch: True
            keep_ratio:True
            size_hint_x: 1
            cache : True
            #on_touch_down: root.down()


                #FitImage:
                #    source:root.profile_source
                #    allow_stretch: True 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
                #    size_hint_x: 1
                #    cache : True

                    #size_hint: (None, None)
                    #size:  [ Window.size[0] ,  Window.size[1] ]



    MDBoxLayout:
        #size_hint_y: .08
        adaptive_height: True

        MDIconButton:
            id:likebutton
            icon: "star"
            size_hint_x: .1

            theme_text_color: "Custom"
            text_color: (0,1,1,1)
            on_release:root.like_fun()

        MDIconButton:
            icon: "dots-vertical"
            size_hint_x: .1
            on_release: root.postdetails()

            theme_text_color: "Custom"
            text_color: (0,0,0)

[Elliot Garbus]

Is the description changing before the kv code is processed? 

That is what I think is going on.  You could try using the default initial value for StringProperty,…  StringProperty() and see if that fixes the problem.

 

Alternatively you could create an on_kv_post method, set a instance var to set a flag and ignore on_description events that occur prior to the kv being processed… or use a try except block and ignore the key error…

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