\documentclass{article}
\usepackage{pdfpages}
%\VignetteIndexEntry{RcppCNPy-reticulate}
%\VignetteKeywords{Python, NumPy, R, data transfer}
%\VignettePackage{RcppCNPy}
%\VignetteEncoding{UTF-8}

\begin{document}
\includepdf[pages=-, fitpaper=true]{pdf/UsingReticulate.pdf}
\end{document}