Add typehints

docs/source/conf.py

@@ -134,6 +134,7 @@ extensions = [
     'sphinx.ext.graphviz',
     'sphinx.ext.napoleon',
     'sphinx.ext.inheritance_diagram',
+    'sphinx_autodoc_typehints'
 
 ]
 
@@ -200,3 +201,8 @@ spelling_ignore_pypi_package_names = True
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = True
+
+set_type_checking_flag = True
+typehints_fully_qualified = True
+always_document_param_types = True
+typehints_document_rtype = True