Invalid data after declaration in Kivy

Question

I don't understand why I have this type of error when I run my code. I've checked this several times and everything seems to be good, still the code does not want to run.

Here's my __main__.py file :

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.anchorlayout import AnchorLayout
from kivy.properties import ObjectProperty  # at top of file

class AccountDetailsForm(AnchorLayout):

    server_box = ObjectProperty()
    username_box = ObjectProperty()
    password_box = ObjectProperty()

    def login(self):
        print(self.server_box.text)
        print(self.username_box.text)
        print(self.password_box.text)


class Orkiv(App):
    pass

Orkiv().run()

And here's my orkiv.kv file :

AccountDetailsForm:

<AccountDetailsForm>:
    anchor_y: "top"
    server_box: server_input
    username_box: username_input
    password_box: password_input

    BoxLayout:
        orientation: "vertical"
        height: "200dp"
        size_hint_y: None

        GridLayout:
            cols: 2
            row_default_height: "40dp"
            row_force_default: True
            spacing: "10dp"
            padding: "10dp"
        Label:
            text: "Server" //THE ERROR SEEMS TO HAPPEN HERE
        AccountDetailsTextInput:
            id: server_input
        Label:
            text: "Username"
        AccountDetailsTextInput:
            id: username_input
        Label:
            text: "Password"
        AccountDetailsTextInput:
            password: True
            id: password_input

    Button:
        size_hint_y: None
        height: "40dp"
        text: "Login"
        on_press: root.login()

Any ideas ? Thanks.

Answer 1

In your orkiv.kv file, change AccountDetailsTextInput to just TextInput.

AccountDetailsForm:

<AccountDetailsForm>:

    anchor_y: "top"
    server_box: server_input
    username_box: username_input
    password_box: password_input

    BoxLayout:

        orientation: "vertical"
        height: "200dp"
        size_hint_y: None

        GridLayout:
            cols: 2
            row_default_height: "40dp"
            row_force_default: True
            spacing: "10dp"
            padding: "10dp"

        Label:
            text: "Server"

        TextInput:
            id: server_input

        Label:
            text: "Username"

        TextInput:
            id: username_input

        Label:
            text: "Password"

        TextInput:
            password: True
            id: password_input

    Button:

        size_hint_y: None
        height: "40dp"
        text: "Login"
        on_press: root.login()

The app should run. See my output below.

Let us know if this helps.

Answer 2

According to kivy module documentation, if you want to provide a box for editable plain text use the class "TextInput". There is no class by the name "AccountDetailsTextInput".