Class TemplateNotFound

src/jinja2/exceptions.py:18–50

Raised if a template does not exist. .. versionchanged:: 2.11 If the given name is :class:`Undefined` and no message was provided, an :exc:`UndefinedError` is raised.

class TemplateNotFound(IOError, LookupError, TemplateError):
    """Raised if a template does not exist.

    .. versionchanged:: 2.11
        If the given name is :class:`Undefined` and no message was
        provided, an :exc:`UndefinedError` is raised.
    """

    # Silence the Python warning about message being deprecated since
    # it's not valid here.
    message: t.Optional[str] = None

    def __init__(
        self,
        name: t.Optional[t.Union[str, "Undefined"]],
        message: t.Optional[str] = None,
    ) -> None:
        IOError.__init__(self, name)

        if message is None:
            from .runtime import Undefined

            if isinstance(name, Undefined):
                name._fail_with_undefined_error()

            message = name

        self.message = message
        self.name = name
        self.templates = [name]

    def __str__(self) -> str:
        return str(self.message)


class TemplatesNotFound(TemplateNotFound):