Doc: CG: add note about using python libraries.

diff --git a/Documentation/contributor/basic-compile.itexi b/Documentation/contributor/basic-compile.itexi
index c13e16a4f0027dcd0c9f29bf823692e4cdeb79c3..17b4f313187f1d7e750b2c5e550a6653d7051f77 100644 (file)
--- a/Documentation/contributor/basic-compile.itexi
+++ b/Documentation/contributor/basic-compile.itexi
@@ -600,3 +600,14 @@ Debian GNU/Linux
         ttf-kochi-gothic ttf-kochi-mincho \
         xfonts-bolkhov-75dpi xfonts-cronyx-100dpi xfonts-cronyx-75dpi
 @end verbatim
+
+
+@unnumberedsubsubsec Using lilypond python libraries
+
+If you want to use lilypond's python libraries (either running
+certain build scripts manually, or using them in other programs),
+set @code{PYTHONPATH} to @file{python/out} in your build
+directory, or @file{.../usr/lib/lilypond/current/python} in the
+installation directory structure.
+
+