Add .provider attribute

Author: rmk135

docs/main/changelog.rst

@@ -10,6 +10,8 @@ follows `Semantic versioning`_
 Development version
 -------------------
 - Add ``FactoryAggregate`` provider.
+- Add ``Provider.provider`` dynamic attribute that return new provider's 
+  delegate (alias of method ``Provider.delegate()``).
 - Add support of six 1.11.0.
 - Regenerate C sources using Cython 0.27.1.
 

examples/providers/factory_delegation.py

@@ -51,3 +51,18 @@ def main_photo(self):
 # Making some asserts:
 assert isinstance(user1.main_photo, Photo)
 assert isinstance(user2.main_photo, Photo)
+
+# or using Factory(...).provider
+
+photos_factory = providers.Factory(Photo)
+users_factory = providers.Factory(User,
+                                  photos_factory=photos_factory.provider)
+
+
+# Creating several User objects:
+user1 = users_factory()  # Same as: user1 = User(photos_factory=photos_factory)
+user2 = users_factory()  # Same as: user2 = User(photos_factory=photos_factory)
+
+# Making some asserts:
+assert isinstance(user1.main_photo, Photo)
+assert isinstance(user2.main_photo, Photo)