read the docs

docs/conf.py

@@ -37,6 +37,10 @@
     cmd_line_template = "sphinx-apidoc -f -o {outputdir} {moduledir}"
     cmd_line = cmd_line_template.format(outputdir=output_dir, moduledir=module_dir)
     apidoc.main(cmd_line.split(" "))
+else:
+    import sphinx_rtd_theme
+    html_theme = "sphinx_rtd_theme"
+    html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 
 # -- General configuration -----------------------------------------------------
 
@@ -124,7 +128,6 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 # html_theme = 'alabaster'
-html_theme = 'sphinx_rtd_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the