dseuss/mpnum

\RequirePackage{luatex85}
\documentclass[crop,tikz]{standalone}

\usetikzlibrary{calc,backgrounds}
\usepackage{luatextra}

\begin{document}

\definecolor{lightyellow}{RGB}{254,237,174}
\newcommand{\labellineshorten}{3pt}
\tikzstyle{tensornode}=[draw,minimum size=1, fill=lightyellow, rounded corners=0.1cm]
\tikzstyle{tensorleg}=[thick]
\tikzstyle{labelline}=[thin,shorten <=\labellineshorten, color=gray]
\tikzstyle{labelnode}=[font=\sffamily, anchor=west, align=center, color=black]

\begin{luacode}
  mpt = require('mptikz/mptikz')
  mpt.defaults['tensor_style'] = 'tensornode'
  mpt.defaults['leg_style'] = 'tensorleg'

  function printt(str, ...)
    local arg = {...}
    tex.print(string.format(str, unpack(arg)))
  end
\end{luacode}

\begin{tikzpicture}
  \input{\inputfile}
\end{tikzpicture}

\end{document}