How to insert a text from a variable to a kivy label which is made by me?

[Lovindu Lochana]

I want to insert a text from a variable to a label which is made by me. I want to enter the date in the variable fuldate in to a label which is known as Date_lbl. But it gives an error like " NameError: name 'fulldate' is not defined". I tried a lot and I can't find a way to do this. 

This is the code in the py file.

from kivy.app import App

from kivy.uix.floatlayout import FloatLayout

from kivy.uix.image import Image

from kivy.lang import Builder

from kivy.uix.boxlayout import BoxLayout

import datetime

from kivy.config import Config

Config.set('graphics', 'width', '900')

Config.set('graphics', 'height', '500')

Config.write()

month = datetime.datetime.now().strftime("%B")

date = datetime.datetime.now().strftime("%w")

fulldate = (month+", "+date)

Builder.load_file('total_wealth.kv')

class Money_Manager(App, FloatLayout):

    def build(self):     

        return self

 

    

Money_Manager().run()

This is the code of the kv file.

<SmoothLabel@Label>

background_color: (0,0,0,0)

background_normal: ''

back_color: (255,255,255,1)

border_radius: [18]

canvas.before:

Color:

rgba: (255,255,255,0.3)

RoundedRectangle:

size: self.size

pos: self.pos

radius: self.border_radius

<Money_Manager>

FloatLayout:

size_hint_y: None

height:150

Image:

pos: 0,350

source:'image4.png'

size: self.texture_size

allow_stretch: True

keep_ratio: False

SmoothLabel:

id: Total_Wealth

text: "Total Wealth :"

pos: 600,450

size_hint: (.3, .2)

SmoothLabel:

id: Cash

text: "Cash             :"

size_hint: (.3,0.2)

pos: 600,410

SmoothLabel:

id: Savings

text: "Savings        :"

size_hint: (.3,0.2)

pos: 600,370

SmoothLabel:

id: Date_lbl

text: fulldate

th

[Elliot Garbus]

I’ve made a few changes.  I created a new class, MoneyManager that inherits from FloatLayout.  I have included your variables as members of this class.  In kv, I added full date to the Label by using root.fulldate.  see: https://kivy.org/doc/stable/api-kivy.lang.html?highlight=lang#value-expressions-on-property-expressions-ids-and-reserved-keywords

 

I also added a method to the class to highlight how a kivy property can be used to create a dynamic binding between your python code and kivy. When savings is updated, it is automatically updated on the screen.

 

------------------------

 

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout

from kivy.lang import Builder
from kivy.config import Config
from kivy.properties import NumericProperty

import datetime

Config.set('graphics', 'width', '900')
Config.set('graphics', 'height', '500')
# Config.write() This writes to kivy config


class MoneyManager(FloatLayout):
    month = datetime.datetime.now().strftime("%B")
    date = datetime.datetime.now().strftime("%w")
    fulldate = (month + ", " + date)
    # Make these kivy properties if they are going to be updated
    savings = NumericProperty(0.00)

    def add_savings(self):
        self.savings += 100

class MoneyManagerApp(App):
    def build(self):
        return Builder.load_file('total_wealth.kv')


MoneyManagerApp().run()

 

 

 

<SmoothLabel@Label>
   background_color: (0,0,0,0)
   background_normal: ''
   back_color: (255,255,255,1)
   border_radius: [18]
   canvas.before:
      Color:
         rgba: (255,255,255,0.3)
      RoundedRectangle:
         size: self.size
         pos: self.pos
         radius: self

.border_radius

MoneyManager:
    size_hint_y: None
    height:150
    Image:
        pos: 0,350
        source:'image4.png'
        size: self.texture_size
        allow_stretch: True
        keep_ratio: False

    SmoothLabel:
        id: Total_Wealth
        text: "Total Wealth :"
        pos: 600,450
        size_hint: (.3, .2)

    SmoothLabel:
        id: Cash
        text: "Cash             :"
        size_hint: (.3,0.2)
        pos: 600,410

    SmoothLabel:
        id: savings
        text: "Savings        : " +  str(root.savings)
        size_hint: (.3,0.2)
        pos: 600,370

    BoxLayout:
        SmoothLabel:
            id: Date_lbl
            text: root.fulldate  # root is the root of this rule, MoneyManager

        Button:
            text: 'Add to Savings'
            on_release: root.add_savings()

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