add intersphinx mapping to Python

Author: niksirbi

docs/source/conf.py

@@ -122,3 +122,8 @@
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
 # html_static_path = ['_static']
+
+
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3", None),
+}