This tell's intersphinx where to find documentation for other
projects. Currently we've only told it about the standard Python
libraries.
http://sphinx.pocoo.org/latest/ext/intersphinx.html#confval-intersphinx_mapping
# If false, no module index is generated.
#latex_use_modindex = True
+
+# -- Options for LaTeX intersphinx----------------------------------------------
+
+intersphinx_mapping = {'http://docs.python.org/dev': None}