Copy code from lstlisting excluding line number

I have this latex code

\documentclass{article}\usepackage[lmargin=2.5cm,rmargin=2.5cm,tmargin=1.5cm,bmargin=3.5cm]{geometry}\usepackage{listings}  % Environment meant for source code (useful for word-wrapping verbatim text)\begin{document}\lstset{basicstyle = \verbatim@font,columns=fullflexible,numbers=left}\begin{lstlisting}//Define VariablesTest1_up = [XZ:This (Index)][1];Test2_down = [XZ:This Index][1];//Specify Parameter Valuesbeta1 = .2238202445016966;beta2 = .6676275732948469;\end{lstlisting}\end{document}

It shows:

And when the reader try to select the code to copy/paste it, the line numbers are also selected:

Does exists some latex feature that let the reader copy the code excluding the line numbers?

Thanks!