Automated generation of graphs to be included

[Neal Becker]

I wrote a little python to generate a bunch of graphs.  How do I format this
to a file to include in lyx?

I tried making a file with:

\begin_layout Standard
\begin_inset Graphics
        filename N=512,e=--20.pdf
        width 100line%

\end_inset

And tried insert/file/lyx, but lyx says it's not a lyx file.  What is the
best way to implement this?