\ProvidesPackage{di/landscape}
\RequirePackage{pdflscape}

\ExplSyntaxOn
\NewDocumentEnvironment{dilandscape}{}
{
	\begin{landscape}
	\nolinenumbers % disable line numbers since they will be placed over the footer.
}
{
	\end{landscape} % re-enable line numbers
	\linenumbers
}
\ExplSyntaxOff