Add auth system example

examples/auth_system.py

@@ -0,0 +1,40 @@
+"""Pythonic way for Dependency Injection."""
+
+from dependency_injector import providers
+from dependency_injector import injections
+
+
+@providers.DelegatedCallable
+def get_user_info(user_id):
+    """Return user info."""
+    raise NotImplementedError()
+
+
+@providers.Factory
+@injections.inject(get_user_info=get_user_info)
+class AuthComponent(object):
+    """Some authentication component."""
+
+    def __init__(self, get_user_info):
+        """Initializer."""
+        self.get_user_info = get_user_info
+
+    def authenticate_user(self, token):
+        """Authenticate user by token."""
+        user_info = self.get_user_info(user_id=token + '1')
+        return user_info
+
+
+print AuthComponent
+print get_user_info
+
+
+@get_user_info.override
+@providers.DelegatedCallable
+def get_user_info(user_id):
+    """Return user info."""
+    return {'user_id': user_id}
+
+
+print AuthComponent().authenticate_user(token='abc')
+# {'user_id': 'abc1'}