INNER CODE UNIT · Python

from_context

volfpeter/htmy · htmy/core.py:139

    def from_context(cls, context: Context, default: Self) -> Self: ...

    @classmethod
    def from_context(cls, context: Context, default: Self | None = _MISSING) -> Self | None:
        """
        Looks up an instance of this class from the given context.

        Arguments:
            context: The context the instance should be loaded from.
            default: The default to use if no instance is found in the context. If omitted,
                a `KeyError` is raised on absence.

        Raises:
            KeyError: If no instance was found and no `default` was given.
            TypeError: If the value in the context is not an instance of this class.
        """
        result = context[cls] if default is _MISSING else context.get(cls, default)
        if isinstance(result, cls):

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