Kivy recycleview duplicating data items - python-3.x

Question

I have a recycle view in kivy im writing to it with a list containing text and images, the text is fine but as soon as i write an image its duplicating the image in the view as i scroll down please see code below, how would i stop this from happening, here is my kv file I have a boxlayout with two sets of data, heres a picture of the problem as wellexample
kv file:
<SelectableReportTextbox#BoxLayout>:
text: ''
imagesource: ''
color: ''
Button:
size_hint: .8, 1
text_size : self.text_size
size_hint_y: None
foreground_color: [1, 1, 1, 1]
background_color: (0.2, 0.4, 0.8, 0.9) # root.color
font_name: 'C:\kivy_venv\Graphics\GIL_____.TTF'
font_size: self.height*0.2
background_normal: root.imagesource
text: root.text
ScreenTwo:
rv2: rv2
canvas.before:
Rectangle:
size:self.size #100, 100
pos: self.pos
source: "C:\kivy_venv\Graphics\Jetfireback.png"
RecycleView_B:
bar_width: 6
size_hint: (None, None)
do_scroll_y: True
id: scrlv2
size: (500, 500)
pos_hint: {'center_x': .75, 'center_y': .64}
multiline:True
ProjectRV:
viewclass: 'SelectableReportTextbox' #
orientation: "horizontal"
scroll_type: ['bars', 'content']
scroll_wheel_distance: dp(114)
key_size: "height"
padding:1, 1
space_x: self.size[0]/3
id: rv2
pos_hint: {'center_x': 0.32, 'center_y': 0.525}
bar_width: dp(25)
bar_color: (0.7, 0.1, 0.3, 0.7)
bar_inactive_color: (0.1, 0.1, 0.1 , 1)
scroll_y : 0
SelectableRecycleBoxLayout:
rv2:rv2
spacing : '6'
default_size_hint: 1, None
size_hint_y: None
size_hint_x: 1
height: self.minimum_height
multiselect: True
touch_multiselect: True
orientation: 'vertical'
main.py:
class SelectableRecycleBoxLayout(FocusBehavior,LayoutSelectionBehavior,RecycleBoxLayout):
''' Adds selection and focus behaviour to the view. '''
class SelectableReportTextbox(RecycleDataViewBehavior):
selectable = BooleanProperty(True)
index =None
selected = BooleanProperty(False)
def __init__(self, **kw):
super().__init__(**kw)
def refresh_view_attrs(self, rv, index, data):
''' Catch and handle the view changes '''
self.index = index
return super(SelectableRecycleBoxLayout, self).refresh_view_attrs(
rv, index, data)
class ProjectRV(RecycleView):
def __init__(self, **kwargs):
super(ProjectRV, self).__init__(**kwargs)
class RecycleView_B(RecycleView):
pass
class ScreenTwo(Screen):
TEXT_FILE = open("output.txt", "a")
zdata = re.search('{.*,', strdata).group(0)
splitex = zdata.split(':' + "'")[1]
print (zdata)
TEXT_FILE.write(zdata)
TEXT_FILE.close()
with open("output.txt", "r") as f:
txtdata = eval(str('[' + ''.join(f.readlines()) + ']'))#ast.literal_eval
nstring = type(txtdata)
self.rv2.data = txtdata
self.rv2.refresh_from_viewport()
self.rv2.refresh_from_data()

Answer 1

The RecycleView re-uses viewclass object instances, and sets properties of those instances based on the data dictionaries. So, if one of your dictionaries sets the imagesource property of a viewclsas instance and then that instance is re-used for a dictionary that does not set the imagesource property, then that instance will retain that prior value of imagesource. The fix is to make sure that every dictionary in the data contains a value for every property of the viewclass. Each dictionary needs to include values for text, imagesource, and color, even if the value is ''.