Insert top-level directory on path for sphinx

docs/conf.py

@@ -11,14 +11,17 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
+import os
+import sys
+
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 # sys.path.insert(0, os.path.abspath('.'))
+sys.path.insert(0, os.path.abspath(os.pardir))
 
 # -- General configuration ----------------------------------------------------
 
-import os
 
 on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
 if on_rtd: