how to add and fill a TabPane to an existing TabbedContent

[nnako]

In the demo application, the widget description and the api documentation, TabbedContent elements are always created using the with statement and a couple of yield statements to add respective child TabPane elements.

Unfortunately, within my own application, I was not able to add and define a new TabPane element to an existing TabbedContent element. Within the api documentation, I am led to the method add_pane() of the TabbedContent class. And within this method, I can reference a TabPane object. But I don't know how to add a valid *children element of the latter. As I understand it, these *children elements would hold the content for the respective new tab:

profiles = [ 'Tab1', 'Tab2', 'Tab3' ]
for _profile in profiles:
    _TabPane = _TabbedContent.add_pane(
        pane=TabPane(
            title=_profile,
            name=_profile,
            id=_profile.lower(),

?           children=Static("<description>", classes="profile",)

            )
        )

Is there a way to dynamically add and fill further TabPane elements? There has been a solution presented for a similar question, but that one from 2023 would definitely be too verbose and might not even work anymore.

Thanks.

[TomJGooding]

It looks like you are pretty much there already, unless I've misunderstood your question.

Here's a quick example:

from textual.app import App, ComposeResult
from textual.widgets import Footer, Static, TabbedContent, TabPane


class ExampleApp(App):
    BINDINGS = [
        ("a", "add_panes", "Add panes"),
    ]

    def compose(self) -> ComposeResult:
        yield TabbedContent()
        yield Footer()

    def action_add_panes(self) -> None:
        tabbed_content = self.query_one(TabbedContent)
        for i in range(1, 4):
            tabbed_content.add_pane(
                TabPane(
                    f"Tab{i}",
                    Static(f"Tab{i} content"),
                )
            )


if __name__ == "__main__":
    app = ExampleApp()
    app.run()

[willmcgugan]

Good solution. You can also subclass TabPane and yield its children from compose().

[nnako]

Thanks

My "mistake" was to use the parameters of TabPane as keyword arguments and not try to use them as positional arguments.

As this seems to be a general concept for documentation, where do I find notes about how to use a parameter which is written as e.g. *children? Reading it within the documentation, I would try to use a proper keyword. But the solution would be to "forget" the given keyword and provide the parameter as a positional one.

[willmcgugan]

The * syntax denotes positional arguments in Python. https://docs.python.org/3/tutorial/controlflow.html#arbitrary-argument-lists