add nbsphinx and sphinx_gallery in sphinx conf

docs/source/conf.py

@@ -30,6 +30,8 @@ extensions = [
     'sphinx.ext.viewcode',
     'sphinx.ext.githubpages',
     'sphinx.ext.napoleon',
+    "nbsphinx",
+    "sphinx_gallery.load_style",
 ]
 
 # Napoleon settings
@@ -53,9 +55,9 @@ exclude_patterns = []
 autodoc_mock_imports = ['numpy', 'geopandas', 'matplotlib', 'scipy', 'imageio', 'pandas', 'shapely', 'joblib']
 
 intersphinx_mapping = {
-                       'numpy': ('http://docs.scipy.org/doc/numpy', None),
-                       'scipy': ('http://docs.scipy.org/doc/scipy/reference', None),
-                       }
+    'numpy': ('http://docs.scipy.org/doc/numpy', None),
+    'scipy': ('http://docs.scipy.org/doc/scipy/reference', None),
+}
 
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output