I am writing a program to calculate paces for different track events and I am trying to set a variable that represents the event that the user chose to calculate.
Below is the section of the .py file
class InitialScreen(Screen):
def press(self, *args, **kwargs):
if kwargs['event'] == '600':
eventpress = 'event600'
App.get_running_app().root.current = 'calculatorbelow_screen'
if kwargs['event'] == '800':
eventpress = 'event800'
App.get_running_app().root.current = 'calculatorbelow_screen'
return eventpress
Below is the section of the .kv file
<InitialScreen>:
name: "initial"
GridLayout:
size: root.width, root.height
rows:5
GridLayout:
cols: 1
Label:
text: "Choose your event"
font_size: 60
bold: True
GridLayoutInitial:
ButtonEventRow1:
id: event600
text: "600m"
on_press: root.press(event='600')
ButtonEventRow1:
id: event800
text: "800m"
on_press: root.press(event='800')
The Error message is below:
File "D:\PYTHON PROJECTS\PROJECT 1\Pace Calculator\pacemain.py", line 24, in press if kwargs['event'] == '600': ~~~~~~^^^^^^^^^ KeyError: 'event'
The full .py file is below
import kivy
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput
from kivy.uix.widget import Widget
from kivy.graphics import Color, Rectangle
from kivy.uix.floatlayout import FloatLayout
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.core.window import Window
from kivy.properties import ListProperty
kivy.require("2.3.0")
Window.clearcolor = 0, .5, 1, 1
class InitialScreen(Screen):
def press(self, *args, **kwargs):
if kwargs['event'] == '600':
eventpress = 'event600'
App.get_running_app().root.current = 'calculatorbelow_screen'
if kwargs['event'] == '800':
eventpress = 'event800'
App.get_running_app().root.current = 'calculatorbelow_screen'
return eventpress
class CalculatorScreenBelowMile(Screen):
#def __init__(self, **kwargs):
#super().__init__(**kwargs)
def press_calculate_below(self, **kwargs):
splitslist = []
userevent = InitialScreen().press()
resultsbelow = self.ids.inputbelow.text
if userevent == 'event600':
splitsdividing = [6, 3, 2, 1.5]
if userevent == 'event800':
splitsdividing = [8,4,2.67,2]
if userevent == 'event1000':
splitsdividing = [10, 5, 3.33, 2.5]
if userevent == 'event1mile':
splitsdividing = [16, 8, 5.33, 4]
for i in splitsdividing:
results = resultsbelow
results = int(results)
results = results / i
results = int(results) #removes decimals
results = str(results)
splitslist.append(results)
print(splitslist)
self.ids.event100split.text = (splitslist[0])
self.ids.event200split.text = (splitslist[1])
self.ids.event300split.text = (splitslist[2])
self.ids.event400split.text = splitslist[3]
def press_return(self, **kwargs):
App.get_running_app().root.current = "initial"
class CalculatorScreenAboveMile(Screen): #Have not started on this yet
def press(self):
pass
class WindowManager(ScreenManager):
pass
kv = Builder.load_file('pacemain.kv')
class MainApp(App):
def build(self):
return kv
if __name__=="__main__":
MainApp().run()
And finally the full .kv file is below (Note that I am asking specifically about the CalculatorScreenBelowMile and not the CalculatorScreenAboveMile)
WindowManager:
InitialScreen:
CalculatorScreenBelowMile:
CalculatorScreenAboveMile:
<ButtonEventRow1@Button>
background_color: 0,0,1,1
<ButtonEventRow2@Button>
background_color: 1,0,0,1
<ButtonEventRow3@Button>
background_color: 0,1,0,1
<GridLayoutInitial@GridLayout>
cols: 2
<LabelSplits@Label>
background_color: 0,0,1,1
canvas.before:
Color:
rgba: self.background_color
Rectangle:
size: self.size
pos:self.pos
size_hint: (.5,.5)
font_size: 40
#<pressResults@press>:
<Button>:
font_size: 60
<GridLayout>:
spacing: 10
<InitialScreen>:
name: "initial"
GridLayout:
size: root.width, root.height
rows:5
GridLayout:
cols: 1
Label:
text: "Choose your event"
font_size: 60
bold: True
GridLayoutInitial:
ButtonEventRow1:
id: event600
text: "600m"
on_press: root.press(event='600')
ButtonEventRow1:
id: event800
text: "800m"
on_press: root.press(event='800')
GridLayoutInitial:
ButtonEventRow2:
text: "1000m"
on_press: root.press(event='1000')
ButtonEventRow2:
text: "1 Mile"
on_press: root.press(event='1mile')
GridLayoutInitial:
ButtonEventRow3:
text: "5000m"
#on_release: app.root.current = "calculatorabove"
ButtonEventRow3:
text: "10000m"
#on_release: app.root.current = "calculatorabove"
<CalculatorScreenBelowMile>: #Distances of mile and below
name: "calculatorbelow_screen"
GridLayout:
cols:1
size: root.width, root.height
GridLayout: #Top of page
cols:1
Label:
text: "Pace Calculator. Enter your time in seconds."
font_size: 28
Label:
text: "Ex: 120"
font_size: 50
bold: True
GridLayout: #Enter time and Userinput, calculate and unit
cols:2
Label:
text: "Enter your time here:"
bold: True
font_size: 40
pos_hint_x: .5
pos_hint_y: .8
TextInput:
multiline: False
id: inputbelow
Button:
text: "Calculate"
on_press: root.press_calculate_below()
Button:
text: "Switch unit"
#ADD SOMETHING HERE
GridLayout:
cols: 2
GridLayout: #Return bottom right
cols: 2
rows: 4
LabelSplits:
text: "100m:"
LabelSplits:
id: event100split
text: ""
LabelSplits:
text: "200m:"
LabelSplits:
id: event200split
text: ""
LabelSplits:
text: "300m:"
LabelSplits:
id: event300split
text: ""
LabelSplits:
text: "400m:"
LabelSplits:
id: event400split
text: ""
GridLayout:
cols: 1
Button:
text: "Return"
on_press: root.press_return()
<CalculatorScreenAboveMile>: #Distances of above mile
name: "calculatorabove_screen"
GridLayout:
cols:1
size: root.width, root.height
GridLayout: #Top of page
cols:1
Label:
text: "Pace Calculator. Enter your time in seconds."
font_size: 28
Label:
text: "Ex: 120"
font_size: 50
bold: True
GridLayout: #Enter time and Userinput, calculate and unit
cols:2
Label:
text: "Enter your time here:"
bold: True
font_size: 40
pos_hint_x: .5
pos_hint_y: .8
TextInput:
multiline: False
id: inputbelow
Button:
text: "Calculate"
on_press: root.press()
#on_press: app.calculatorbelow()
#on_press: app.root.current = "resultsabove"
Button:
text: "Switch unit"
#ADD SOMETHING HERE
GridLayout:
cols: 2
GridLayout: #Return bottom right
cols: 2
rows: 4
LabelSplits:
text: "400m:"
LabelSplits:
id: event400split
text: ""
LabelSplits:
text: "800m:"
LabelSplits:
id: event800split
text: ""
LabelSplits:
text: "1200m:"
LabelSplits:
id: event1200split
text: ""
LabelSplits:
text: "1600m:"
LabelSplits:
id: event1600split
text: ""
GridLayout:
cols: 1
Button:
text: "Return"
on_press: app.root.current = "initial"
I have tried other ways of setting a variable equal to the event that the user chose, but if you know of another way I would love to hear it because I am new to kivy and fairly new to Python in general and OOP.
One way to solve this is to just save a reference to the event in your CalculatorScreenBelowMile Screen. You can do that by adding an eventpress property in that class:
class CalculatorScreenBelowMile(Screen):
eventpress = StringProperty('')
Then set that property in your press() method:
class InitialScreen(Screen):
def press(self, *args, **kwargs):
eventpress = None
if kwargs['event'] == '600':
eventpress = 'event600'
App.get_running_app().root.current = 'calculatorbelow_screen'
if kwargs['event'] == '800':
eventpress = 'event800'
App.get_running_app().root.current = 'calculatorbelow_screen'
self.manager.get_screen('calculatorbelow_screen').eventpress = eventpress # set event in the CalculatorScreenBelowMile Screen
# return eventpress
Then use that saved event in your press_calculate_below() method:
def press_calculate_below(self, **kwargs):
splitslist = []
# userevent = InitialScreen().press()
userevent = self.eventpress # use saved event
resultsbelow = self.ids.inputbelow.text
if userevent == 'event600':
splitsdividing = [6, 3, 2, 1.5]
if userevent == 'event800':
splitsdividing = [8,4,2.67,2]
if userevent == 'event1000':
splitsdividing = [10, 5, 3.33, 2.5]
if userevent == 'event1mile':
splitsdividing = [16, 8, 5.33, 4]