diff --git a/examples/di_demo/di_example.py b/examples/di_demo/di_example.py
index 43bb406d..75224b7b 100644
--- a/examples/di_demo/di_example.py
+++ b/examples/di_demo/di_example.py
@@ -8,13 +8,10 @@ class Components(catalogs.DeclarativeCatalog):
     """Components catalog."""
 
     service = providers.Factory(Service)
-    """:type: providers.Factory -> Service"""
 
     client = providers.Factory(Client,
                                service=service)
-    """:type: providers.Factory -> Client"""
 
 
 if __name__ == '__main__':
-    # Application creates Client's instance using its provider
-    client = Components.client()  # equivalent of Client(service=Service())
+    client = Components.client()  # Application creates Client's instance
diff --git a/examples/di_demo/example.py b/examples/di_demo/example.py
index 3d498d9c..3a0d8036 100644
--- a/examples/di_demo/example.py
+++ b/examples/di_demo/example.py
@@ -14,5 +14,4 @@ class Client(object):
 
 
 if __name__ == '__main__':
-    # Application just creates Client's instance
-    client = Client()
+    client = Client()  # Application creates Client's instance
diff --git a/examples/di_demo/ioc_example.py b/examples/di_demo/ioc_example.py
index 08d2fa88..26568096 100644
--- a/examples/di_demo/ioc_example.py
+++ b/examples/di_demo/ioc_example.py
@@ -14,8 +14,5 @@ class Client(object):
 
 
 if __name__ == '__main__':
-    # Application creates Service instance
-    service = Service()
-
-    # and inject Service instance into the Client
-    client = Client(service)
+    service = Service()       # Application creates Service instance
+    client = Client(service)  # and inject Service instance into the Client