KIVY - Error with text input .kv

Question

Here is my code;

Main.py

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivy.network.urlrequest import UrlRequest
from kivy.uix.listview import ListItemButton
from kivy.factory import Factory
import sqlite3
from kivy.uix.label import Label

class LoginRoot(BoxLayout):
    username = ObjectProperty()
    password = ObjectProperty()


    def login_form(self):
        username = (self.username.text)
        password = (self.password.text)
        f = open("text/name.txt", "w")
        f.write("%s" % username)
        f.close()
        f = open("text/pass.txt", "w")
        f.write("%s" % password)
        f.close()

    def log_form(self):
        print ("Hi")

    def id_form(self):
        self.clear_widgets()
        current_weather = Factory.Code()
        self.add_widget(current_weather)
        conn = sqlite3.connect('db/test')
        c = conn.cursor()
        se = open("text/name.txt", "r")
        username = se.read()
        c.execute("SELECT password from userin where username = '%s'" % username)
        se.close()
        d = c.fetchone()
        f = open("yes.txt", "w")
        f.write("%s" % d)
        f.close()
        d = open("yes.txt", "r")
        d = d.read()
        ser = open("text/pass.txt", "r")
        password = ser.read()
        if d == password:
            usernow = ("%s" % username)
            print usernow



class DisocialApp(App):

    pass

class Code(BoxLayout):
idcode = ObjectProperty()

def ids_form(self):
     print (self.idcode.text)


if __name__ == "__main__":
    DisocialApp().run()

Disocial.kv LoginRoot:

<LoginRoot>:
    orientation: "vertical"
    username: user_input
    password: pass_input
    BoxLayout:
        height: "40dp"
        size_hint_y: None
        TextInput:
            id: user_input
            size_hint_x: 50
            focus: True
            multiline: False
        TextInput:
            id: pass_input
            size_hint_x: 50
            focus: True
            multiline: False
        Button:
            text: "Login"
            size_hint_x: 25
            on_press: root.login_form()
        Button:
            text: "Check Places"
            size_hint_x: 25
            on_press: root.id_form()

<Code@BoxLayout>:
    orientation: "vertical"
    idcode: id_input
    BoxLayout:
        height: "40dp"
        size_hint_y: None
        TextInput:
            id: id_input
            size_hint_x: 50
            focus: True
            multiline: False
        Button:
            text: "Login"
            size_hint_x: 25
            on_press: app.root.ids_form()

I know get this error;

File "/home/seandowney/PycharmProjects/SchoolShow/disocial.kv", line 43, in <module>
     on_press: app.root.ids_form()
 AttributeError: 'LoginRoot' object has no attribute 'ids_form'

What I want is to enter the text from (self.idcode.text) and print it.

I have tried multiple things but to no avail and I am getting extremely confused. I believe that idcode = ObjectProperty() should behave like username and password?

Answer 1

you define something like this in your kv file

<RootLogin>
     ....
<Code@BoxLayout>
     idcode = ...

this is roughly equivelent to

class RootLogin:
     ...
class Code(BoxLayout):
     idcode = ...

so why would you think you could do this

a = RootLogin()
a.idcode    #idcode is an attribute of Code ... not RootLogin

Im not sure what you are expecting this stuff to do so I cant help much more than that

Answer 2

idcode = ObjectProperty()

This is the only place that you set idcode for that class. The default value is None, therefore you get the given error.

You do set the idcode property of your Code class, but never access this. I'm not sure what you think should be accessing it, please elaborate on what you think should happen if it's still not clear to you what is wrong.